Signal
Submitted
Feb 13, 2026, 19:25 UTC
Unidentified drones forced closure of Aalborg airport and caused temporary shutdown of Copenhagen airport in Denmark, described as a professionally coordinated hybrid attack possibly linked to Russian efforts to test NATO defenses.
Denmark's Aalborg airport was closed on the night of September 24, 2025, after 'more than one' unidentified drone was sighted flying with lights on near the airport, which serves both commercial and military flights including NATO operations. The drone activity lasted several hours beginning at 19:44 GMT and forced flights to be halted until 04:00 GMT on the following day. Three other smaller airports—Esbjerg, Sonderborg, and Skrydstrup (home to Denmark’s F-16 and F-35 fighters)—reported drone sightings but remained operational. This incident followed a similar shutdown of Copenhagen airport just days earlier. Danish Defence Minister Troels Lund Poulsen described the coordinated incidents as a professional hybrid attack designed to sow fear and division, pointing to a pattern linked to a series of suspected Russian drone incursions across Europe. Danish police are investigating and working alongside armed forces to identify the actors. The incidents have raised serious concern within NATO, with European leaders including the European Commission’s Ursula von der Leyen signaling readiness to consider defensive measures such as shooting down intruding fighter jets. The Kremlin denied responsibility. The events have intensified calls for NATO members to strengthen border defenses amid repeated drone violations across the region.
Confidence: Medium
The event involves coordinated unauthorized drone activity targeting critical national airports, including military bases, described by government officials as a hybrid attack with intent to spread fear and test NATO defenses amid ongoing regional tensions and accusations against Russia. The professional, simultaneous nature of the drone incursions supports classification as hostile aggression.
Source URL
https://aljazeera.com/news/2025/9/25/denmark-shuts-second-airport-in-a-week-more-unidentified-drones-spotted
Published as a hybrid-warfare signal with a public source and reviewer-approved assessment bands. See the methodology for how records are assessed.
{
"id": "5f5b98e0-67b7-4c2f-bb88-d0e96d7d81ca",
"url": "https://aljazeera.com/news/2025/9/25/denmark-shuts-second-airport-in-a-week-more-unidentified-drones-spotted",
"source": "extension",
"status": "approved",
"category": "Military & Paramilitary Operations",
"subcategory": "Unconventional / Paramilitary",
"incident_type": "Unknown",
"country": "Denmark",
"source_reliability": "C",
"info_credibility": "3",
"tags": [
"Denmark",
"Drones",
"Hybrid attack",
"NATO",
"Russia",
"Aalborg airport",
"Copenhagen airport",
"Airspace violation",
"Critical infrastructure",
"Military disruption"
],
"nodes": [
"Node 1: Borders"
],
"countries": [
"Denmark"
],
"where_text": "Airspace",
"headline": null,
"description": "On September 24, 2025, several Danish airports reported unauthorized drone activity, leading to the closure of Aalborg airport which supports both commercial and military flights, following a temporary shutdown of Copenhagen airport. Danish officials and police described the incidents as a systematic hybrid attack intended to spread fear and division, involving multiple drones flying simultaneously over different locations. The events come amid broader regional tensions with recent similar drone incursions reported in Estonia, Poland, and Romania, and accusations that Russia is testing NATO defenses. Danish Defence Minister Troels Lund Poulsen and Justice Minister Peter Hummelgaard emphasized the professional nature and strategic intent behind the drone flyovers. NATO and EU officials expressed serious concern, with discussions of defensive measures including the option to engage intruding aircraft. Danish authorities have launched an intensive investigation and have not ruled out a prank, but view the attacks as the most serious targeting of Denmark's critical infrastructure to date. The drones were observed with lights on, flying near Aalborg airport starting around 19:44 UTC and remained for several hours. Other drone sightings were reported near Esbjerg, Sønderborg, and the Skrydstrup Fighter Wing base, which hosts Danish F-16 and F-35 jets. The incidents disrupted military operations and civilian air traffic, prompting coordination between Danish police, armed forces, NATO, and European air traffic control.",
"summary_short": "Unidentified drones forced closure of Aalborg airport and caused temporary shutdown of Copenhagen airport in Denmark, described as a professionally coordinated hybrid attack possibly linked to Russian efforts to test NATO defenses.",
"summary_extended": "Denmark's Aalborg airport was closed on the night of September 24, 2025, after 'more than one' unidentified drone was sighted flying with lights on near the airport, which serves both commercial and military flights including NATO operations. The drone activity lasted several hours beginning at 19:44 GMT and forced flights to be halted until 04:00 GMT on the following day. Three other smaller airports—Esbjerg, Sonderborg, and Skrydstrup (home to Denmark’s F-16 and F-35 fighters)—reported drone sightings but remained operational. This incident followed a similar shutdown of Copenhagen airport just days earlier. Danish Defence Minister Troels Lund Poulsen described the coordinated incidents as a professional hybrid attack designed to sow fear and division, pointing to a pattern linked to a series of suspected Russian drone incursions across Europe. Danish police are investigating and working alongside armed forces to identify the actors. The incidents have raised serious concern within NATO, with European leaders including the European Commission’s Ursula von der Leyen signaling readiness to consider defensive measures such as shooting down intruding fighter jets. The Kremlin denied responsibility. The events have intensified calls for NATO members to strengthen border defenses amid repeated drone violations across the region.",
"actor_primary": "Russian state-backed group",
"target_primary": null,
"location_text": "Aalborg airport and surrounding airspace",
"location_region": "Jutland",
"location_coordinates_lat": 57.092,
"location_coordinates_lon": 9.85,
"location_precision": "Exact",
"is_aggressor_signal": true,
"signal_type": "HYBRID_SIGNAL",
"is_hybrid_war_signal": true,
"classification_complete": true,
"hybrid_signal_complete": true,
"classification_confidence": "Medium",
"classification_rationale": "The event involves coordinated unauthorized drone activity targeting critical national airports, including military bases, described by government officials as a hybrid attack with intent to spread fear and test NATO defenses amid ongoing regional tensions and accusations against Russia. The professional, simultaneous nature of the drone incursions supports classification as hostile aggression.",
"event_time_utc": "2025-09-24T19:44:00.000Z",
"end_time_utc": "2025-09-25T04:00:00.000Z",
"event_time_confidence": "pm1h",
"created_at": "2026-02-13T19:25:08.695Z",
"updated_at": "2026-11-08T20:47:11.696Z",
"reliability_band": "strong",
"location_precision_band": "exact",
"time_precision_band": "within_1h",
"severity_band": "significant",
"attribution_confidence_band": "medium",
"attribution_basis": "single_source"
}Source reliability
C
Info credibility
3
Event time
Sep 24, 2025, 19:44 UTC
End time
Sep 25, 2025, 04:00 UTC
Event time confidence
pm1h
Location
Aalborg airport and surrounding airspace
Region
Jutland
Primary actor
Russian state-backed group
Country
Denmark
Countries
Denmark
Tags
Denmark, Drones, Hybrid attack, NATO, Russia, Aalborg airport, Copenhagen airport, Airspace violation, Critical infrastructure, Military disruption
Nodes
Node 1: Borders
Signal
Submitted
Feb 13, 2026, 19:25 UTC
Unidentified drones forced closure of Aalborg airport and caused temporary shutdown of Copenhagen airport in Denmark, described as a professionally coordinated hybrid attack possibly linked to Russian efforts to test NATO defenses.
Denmark's Aalborg airport was closed on the night of September 24, 2025, after 'more than one' unidentified drone was sighted flying with lights on near the airport, which serves both commercial and military flights including NATO operations. The drone activity lasted several hours beginning at 19:44 GMT and forced flights to be halted until 04:00 GMT on the following day. Three other smaller airports—Esbjerg, Sonderborg, and Skrydstrup (home to Denmark’s F-16 and F-35 fighters)—reported drone sightings but remained operational. This incident followed a similar shutdown of Copenhagen airport just days earlier. Danish Defence Minister Troels Lund Poulsen described the coordinated incidents as a professional hybrid attack designed to sow fear and division, pointing to a pattern linked to a series of suspected Russian drone incursions across Europe. Danish police are investigating and working alongside armed forces to identify the actors. The incidents have raised serious concern within NATO, with European leaders including the European Commission’s Ursula von der Leyen signaling readiness to consider defensive measures such as shooting down intruding fighter jets. The Kremlin denied responsibility. The events have intensified calls for NATO members to strengthen border defenses amid repeated drone violations across the region.
Confidence: Medium
The event involves coordinated unauthorized drone activity targeting critical national airports, including military bases, described by government officials as a hybrid attack with intent to spread fear and test NATO defenses amid ongoing regional tensions and accusations against Russia. The professional, simultaneous nature of the drone incursions supports classification as hostile aggression.
Source URL
https://aljazeera.com/news/2025/9/25/denmark-shuts-second-airport-in-a-week-more-unidentified-drones-spotted
Published as a hybrid-warfare signal with a public source and reviewer-approved assessment bands. See the methodology for how records are assessed.
{
"id": "5f5b98e0-67b7-4c2f-bb88-d0e96d7d81ca",
"url": "https://aljazeera.com/news/2025/9/25/denmark-shuts-second-airport-in-a-week-more-unidentified-drones-spotted",
"source": "extension",
"status": "approved",
"category": "Military & Paramilitary Operations",
"subcategory": "Unconventional / Paramilitary",
"incident_type": "Unknown",
"country": "Denmark",
"source_reliability": "C",
"info_credibility": "3",
"tags": [
"Denmark",
"Drones",
"Hybrid attack",
"NATO",
"Russia",
"Aalborg airport",
"Copenhagen airport",
"Airspace violation",
"Critical infrastructure",
"Military disruption"
],
"nodes": [
"Node 1: Borders"
],
"countries": [
"Denmark"
],
"where_text": "Airspace",
"headline": null,
"description": "On September 24, 2025, several Danish airports reported unauthorized drone activity, leading to the closure of Aalborg airport which supports both commercial and military flights, following a temporary shutdown of Copenhagen airport. Danish officials and police described the incidents as a systematic hybrid attack intended to spread fear and division, involving multiple drones flying simultaneously over different locations. The events come amid broader regional tensions with recent similar drone incursions reported in Estonia, Poland, and Romania, and accusations that Russia is testing NATO defenses. Danish Defence Minister Troels Lund Poulsen and Justice Minister Peter Hummelgaard emphasized the professional nature and strategic intent behind the drone flyovers. NATO and EU officials expressed serious concern, with discussions of defensive measures including the option to engage intruding aircraft. Danish authorities have launched an intensive investigation and have not ruled out a prank, but view the attacks as the most serious targeting of Denmark's critical infrastructure to date. The drones were observed with lights on, flying near Aalborg airport starting around 19:44 UTC and remained for several hours. Other drone sightings were reported near Esbjerg, Sønderborg, and the Skrydstrup Fighter Wing base, which hosts Danish F-16 and F-35 jets. The incidents disrupted military operations and civilian air traffic, prompting coordination between Danish police, armed forces, NATO, and European air traffic control.",
"summary_short": "Unidentified drones forced closure of Aalborg airport and caused temporary shutdown of Copenhagen airport in Denmark, described as a professionally coordinated hybrid attack possibly linked to Russian efforts to test NATO defenses.",
"summary_extended": "Denmark's Aalborg airport was closed on the night of September 24, 2025, after 'more than one' unidentified drone was sighted flying with lights on near the airport, which serves both commercial and military flights including NATO operations. The drone activity lasted several hours beginning at 19:44 GMT and forced flights to be halted until 04:00 GMT on the following day. Three other smaller airports—Esbjerg, Sonderborg, and Skrydstrup (home to Denmark’s F-16 and F-35 fighters)—reported drone sightings but remained operational. This incident followed a similar shutdown of Copenhagen airport just days earlier. Danish Defence Minister Troels Lund Poulsen described the coordinated incidents as a professional hybrid attack designed to sow fear and division, pointing to a pattern linked to a series of suspected Russian drone incursions across Europe. Danish police are investigating and working alongside armed forces to identify the actors. The incidents have raised serious concern within NATO, with European leaders including the European Commission’s Ursula von der Leyen signaling readiness to consider defensive measures such as shooting down intruding fighter jets. The Kremlin denied responsibility. The events have intensified calls for NATO members to strengthen border defenses amid repeated drone violations across the region.",
"actor_primary": "Russian state-backed group",
"target_primary": null,
"location_text": "Aalborg airport and surrounding airspace",
"location_region": "Jutland",
"location_coordinates_lat": 57.092,
"location_coordinates_lon": 9.85,
"location_precision": "Exact",
"is_aggressor_signal": true,
"signal_type": "HYBRID_SIGNAL",
"is_hybrid_war_signal": true,
"classification_complete": true,
"hybrid_signal_complete": true,
"classification_confidence": "Medium",
"classification_rationale": "The event involves coordinated unauthorized drone activity targeting critical national airports, including military bases, described by government officials as a hybrid attack with intent to spread fear and test NATO defenses amid ongoing regional tensions and accusations against Russia. The professional, simultaneous nature of the drone incursions supports classification as hostile aggression.",
"event_time_utc": "2025-09-24T19:44:00.000Z",
"end_time_utc": "2025-09-25T04:00:00.000Z",
"event_time_confidence": "pm1h",
"created_at": "2026-02-13T19:25:08.695Z",
"updated_at": "2026-11-08T20:47:11.696Z",
"reliability_band": "strong",
"location_precision_band": "exact",
"time_precision_band": "within_1h",
"severity_band": "significant",
"attribution_confidence_band": "medium",
"attribution_basis": "single_source"
}Source reliability
C
Info credibility
3
Event time
Sep 24, 2025, 19:44 UTC
End time
Sep 25, 2025, 04:00 UTC
Event time confidence
pm1h
Location
Aalborg airport and surrounding airspace
Region
Jutland
Primary actor
Russian state-backed group
Country
Denmark
Countries
Denmark
Tags
Denmark, Drones, Hybrid attack, NATO, Russia, Aalborg airport, Copenhagen airport, Airspace violation, Critical infrastructure, Military disruption
Nodes
Node 1: Borders