Attribution of the Tallinn fire

On 29 September 2026, the Estonian government formally attributed an arson attack against defense manufacturer Milrem Robotics to Russian security services. The fire occurred during the night of 15 August at a building used by the company on Betooni Street in the Lasnamäe district of Tallinn. Emergency crews brought the flames under control without casualties or damage to equipment bound for Ukraine. The Estonian Internal Security Service (KAPO) concluded following its inquiry that the operation was directly organized and commissioned by Russian intelligence agencies. Following the findings, Estonian Foreign Minister Margus Tsahkna announced that the ministry summoned Russia's chargé d'affaires in Tallinn.

Prime Minister Kristen Michal presented the findings of the security service during an official briefing.

“Today we can state with complete certainty that the arson at Milrem in Estonia on the night of August 15 was an act of sabotage commissioned by the special services of the Russian Federation.”

Arrests and cross-border investigation

The investigation rapidly expanded into neighbouring Baltic territory within 48 hours of the blaze. Authorities in Latvia arrested two suspects on 17 August and detained a third individual on 18 August. During searches of locations connected to the three men, Latvian police confiscated data storage devices alongside items intended for use in starting fires. Latvian authorities extradited all three suspects to Estonia between 17 and 18 September, where they remain in custody.

Estonian security officials noted that the perpetrators targeted a company that produces THeMIS unmanned ground vehicles in partnership with European Union countries. These tracked machines perform transport, medical evacuation, and mine-clearing missions for the Ukrainian armed forces.

European reaction and Russian denial

Tallinn's findings drew swift diplomatic reactions from European allies, who reiterated their backing for Estonia and Ukraine. French President Emmanuel Macron expressed solidarity with Estonia and cited other recent hostile acts across the continent.

“The multiplication of these hostile acts reflects a dangerous headlong rush by Russia, which will only lead it into an impasse.”

Foreign Minister Tsahkna stated that Estonia intends to pursue stricter sanctions and additional travel restrictions on Russian citizens in coordination with European partners. In Moscow, Kremlin spokesman Dmitri S. Peskov dismissed the allegations, asserting that the Estonian claims lacked factual backing.

“such statements are unsubstantiated and ill-considered.”

Wider sabotage operations

KAPO Director General Margo Palloson reported that the Milrem incident matches the operational profile of other Russian sabotage efforts across Europe. Estonian authorities have arrested more than 20 individuals linked to Russian security operations since the start of the 2022 invasion of Ukraine. Similar operations have occurred elsewhere in the region, including Lithuania's arrest of nine people in May who were accused of planning arson and surveillance tasks directed by Russian military intelligence. German investigators also tied Russian operatives to a recent explosives-laden drone incident near Leipzig Airport. Estonian security officials assess that hostile attempts to disrupt European defense supply chains will persist over the coming years.