A Russian air-cushioned vehicle docked at a stone breakwater that sits on both Russian and Estonian territory, after which guards stepped onto the breakwater and crossed the border before returning to Russia.

Analysts suggest Vladimir Putin’s aims include disrupting Baltic economic activity, slowing mobility, and weakening societal cohesion to test Estonia’s resilience and NATO unity without triggering a major escalation.

The Narva River remains strategically significant as a border area in Baltic security discussions, occurring alongside NATO deployments and sanctions considerations.

Estonian authorities have asked a Russian official for explanations and increased patrols along the border.

Estonian border surveillance detected the incident, and video released by the Estonian Police and Border Guard shows the border crossing; officials say no threat to Estonia's security was identified.

A separate video published by WELT quotes Estonia's foreign ministry confirming that three Russian border guards allegedly crossed into Estonian territory.

The incident fits a broader pattern of Estonia–Russia border and airspace tensions along their 183-mile border, with ongoing monitoring and diplomatic contact."

Estonia plans a border representatives’ meeting for December 18 and will seek a full explanation from Russia, with the foreign ministry summoning the Russian chargé d’affaires.

Estonia has heightened border security along the Narva border area and established formal contact with Russia while requesting explanations.

Estonia maintains that Russian vessels must seek permission to pass through Estonian territory to reach Lake Peipus, citing a longstanding agreement and the expectation of prior notification.

The Narva region is home to a notable Russian minority and is a frequent flashpoint in Baltic security discussions, reflecting Estonia’s security concerns amid Russian activity.

Estonia’s Interior Minister described motives as unclear, stressed no immediate security threat, and said police and border protection have increased presence pending further investigation.