On December 17, 2025, Estonian border guards detected and responded to an illegal crossing by three Russian border guards near the Narva River breakwater.

On December 17, 2025, the Estonian Police and Border Guard detected an illegal crossing of a temporary control line at the Narva River breakwater by three Russian Federation border guards. Estonian border patrols responded promptly, and the Russian border guards withdrew back to Russian territory shortly after. Estonia plans to request an explanation from Russia at a meeting of border representatives and will summon the Chargé d’Affaires of the Russian Embassy in Estonia. This incident represents a cross-border breach by Russian personnel into Estonian territory, escalating tensions at the border.