A suspicious drone was reported flying over the Sako arms factory, hospital, and rescue service areas in Riihimäki, Finland, on the night of February 4-5, 2024. The drone was observed by eyewitnesses and reported to local police and Traficom. Flying drones over the Sako factory is prohibited without permission except for state or Defense Forces use. Authorities have not launched an investigation but continue to monitor drone activity near critical infrastructure.

Military & Paramilitary OperationsUnconventional / ParamilitaryUse of 'little green men' (unmarked soldiers)

Aggressor

Summary

On the night between February 4 and 5, 2024, a suspicious drone was seen flying over the Sako arms factory, the hospital, and the rescue service areas in Riihimäki, Finland. Eyewitnesses reported the drone to Häme police and the Finnish Transport and Communications Agency (Traficom). The observed drone was described as large. Flying drones over the Sako factory is prohibited unless authorized by the company or relevant authorities, with exceptions for the state and Defense Forces. The police did not dispatch a patrol as the report came after the sighting and do not currently know who operated the drone or the purpose behind its flight. The incident was documented in a joint database to analyze drone sightings. Finnish authorities have noted an increase in drone activity near critical infrastructure since 2022 and encourage public reporting of such sightings. Traficom added the Sako factory area to the official no-fly maps after initially missing it. Local officials continue monitoring drone activity but consider this event possibly civilian or hobbyist-related. No formal criminal investigation has been initiated by the police.

Classification

Confidence: High

The sighting of a suspicious drone over a critical military-industrial facility and nearby emergency service areas in a no-fly zone, combined with increased drone activity near critical infrastructure acknowledged by Finnish intelligence, strongly suggests potential hostile reconnaissance or surveillance activity consistent with hybrid warfare tactics.

Source URL

https://yle.fi/a/74-20073034

Open source

Provenance

Publisher: csv-import
Submitted: Feb 13, 2026, 19:25 UTC
Last updated: Nov 8, 2026, 20:58 UTC
Event time: Feb 5, 2024, 00:00 UTC

Published as a hybrid-warfare signal with a public source and reviewer-approved assessment bands. See the methodology for how records are assessed.

Raw record

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  "id": "f313fba2-4cce-4b6e-b606-b0c0993c29b0",
  "url": "https://yle.fi/a/74-20073034",
  "source": "csv-import",
  "status": "approved",
  "category": "Military & Paramilitary Operations",
  "subcategory": "Unconventional / Paramilitary",
  "incident_type": "Use of 'little green men' (unmarked soldiers)",
  "country": "Finland",
  "source_reliability": "C",
  "info_credibility": "3",
  "tags": [
    "drones",
    "Riihimäki",
    "Sako arms factory",
    "Finland",
    "critical infrastructure",
    "no-fly zone",
    "police report",
    "Traficom",
    "hybrid warfare"
  ],
  "nodes": [
    "Node 1: Borders"
  ],
  "countries": [
    "Finland"
  ],
  "where_text": "Airspace",
  "headline": null,
  "description": "On the night between February 4 and 5, 2024, a suspicious drone was seen flying over the Sako arms factory, the hospital, and the rescue service areas in Riihimäki, Finland. Eyewitnesses reported the drone to Häme police and the Finnish Transport and Communications Agency (Traficom). The observed drone was described as large. Flying drones over the Sako factory is prohibited unless authorized by the company or relevant authorities, with exceptions for the state and Defense Forces. The police did not dispatch a patrol as the report came after the sighting and do not currently know who operated the drone or the purpose behind its flight. The incident was documented in a joint database to analyze drone sightings. Finnish authorities have noted an increase in drone activity near critical infrastructure since 2022 and encourage public reporting of such sightings. Traficom added the Sako factory area to the official no-fly maps after initially missing it. Local officials continue monitoring drone activity but consider this event possibly civilian or hobbyist-related. No formal criminal investigation has been initiated by the police.",
  "summary_short": "A suspicious drone was reported flying over the Sako arms factory, hospital, and rescue service areas in Riihimäki, Finland, on the night of February 4-5, 2024. The drone was observed by eyewitnesses and reported to local police and Traficom. Flying drones over the Sako factory is prohibited without permission except for state or Defense Forces use. Authorities have not launched an investigation but continue to monitor drone activity near critical infrastructure.",
  "summary_extended": null,
  "actor_primary": null,
  "target_primary": null,
  "location_text": "Sako arms factory, hospital, and rescue service areas, Riihimäki",
  "location_region": "Kanta-Häme",
  "location_coordinates_lat": 60.7439,
  "location_coordinates_lon": 24.7705,
  "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": "High",
  "classification_rationale": "The sighting of a suspicious drone over a critical military-industrial facility and nearby emergency service areas in a no-fly zone, combined with increased drone activity near critical infrastructure acknowledged by Finnish intelligence, strongly suggests potential hostile reconnaissance or surveillance activity consistent with hybrid warfare tactics.",
  "event_time_utc": "2024-02-05T00:00:00.000Z",
  "end_time_utc": null,
  "event_time_confidence": "pm24h",
  "created_at": "2026-02-13T19:25:06.733Z",
  "updated_at": "2026-11-08T20:58:06.019Z",
  "reliability_band": "strong",
  "location_precision_band": "exact",
  "time_precision_band": "within_24h",
  "severity_band": "minor",
  "attribution_confidence_band": "medium",
  "attribution_basis": "single_source"
}

Public assessmentReliability: StrongSeverity: MinorAttribution: MediumSingle sourceTime: Same dayLocation: Exact

Source reliability

Info credibility

Event time

Feb 5, 2024, 00:00 UTC

Event time confidence

pm24h

Location

Sako arms factory, hospital, and rescue service areas, Riihimäki

Region

Kanta-Häme

Country

Finland

Countries

Finland

Tags

drones, Riihimäki, Sako arms factory, Finland, critical infrastructure, no-fly zone, police report, Traficom, hybrid warfare

Nodes

Node 1: Borders

Loading signal...

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