Estonia foils attempted arson at defense drone maker Threod, arrests eight Latvians
Estonian authorities say unidentified attackers tried to set fire to and explode the Threod Systems building in Viimsi, north of Tallinn, in the early hours of November 14. Eight Latvian citizens were arrested as suspects, with five placed in custody. The Internal Security Service alleges that Russian military intelligence coordinated the operation to disrupt defense deliveries to Ukraine.
Key points
- The attempted arson took place at around 03:00 on November 14 at the Threod Systems building in Viimsi, north of Tallinn.
- Attackers tried to break the windows and pour an flammable liquid inside to trigger an explosion, but company security intervened.
- Eight Latvian citizens were arrested as suspects; prosecutors secured custody of five of them.
- No one was injured, and the building damage did not affect Threod's production capacity or supply capability.
- Threod produces long-range reconnaissance and strike drones and says it cooperates with Ukraine.
- The Internal Security Service said Russian military intelligence's GRU coordinated the operation, which was intended to stop defense deliveries to Ukraine.
- Estonia's government had not announced a final decision on possible road border closures with Russia as of the report.
Why it matters
The attempt targeted a defense manufacturer producing long-range reconnaissance and strike drones. Estonian authorities said Russian military intelligence coordinated the operation to disrupt deliveries to Ukraine, while the arrests of eight Latvian citizens opened a criminal investigation with possible links still being examined. The attack also prompted Estonia to consider tightening its border with Russia, although no final decision had been announced.
What happened
At approximately 03:00 on November 14, unknown attackers approached the Threod Systems building in Viimsi, Estonia, north of Tallinn. They attempted to break the windows and pour an flammable liquid inside to cause an explosion, but company security intervened and prevented the attack from being completed. The building sustained damage, while production capacity and the ability to supply products were unaffected, and no one was injured.
The Internal Security Service, working with the Police and Border Guard Board, detained eight Latvian citizens as suspects. Prosecutors secured custody of five of them, and the case is being investigated as activity against Estonia's security on behalf of a foreign intelligence or security service. Latvian law enforcement and prosecutors are assisting the inquiry, which is examining whether the suspects are linked to others involved in the attack.
How Ukrainian sources describe it
Ukrainian reporting highlights Threod's cooperation with Ukraine, its supply of weapons for testing in combat conditions and the widespread Ukrainian use of its CATA pneumatic launchers for long-range drones. Ukrainian coverage also foregrounds the alleged role of Russian military intelligence and the stated aim of disrupting defense deliveries to Ukraine.
How international sources describe it
International reporting provides additional operational detail, including the time and location of the attack, the method used, the arrests, the custody decisions and the legal basis of the investigation. It also notes Estonia's consideration of closing road border crossings with Russia while making clear that no final decision had been announced.
Background
Threod operates in Viimsi, Estonia, north of Tallinn, and produces reconnaissance drones of long range as well as strike drones. The company says it cooperates with Ukraine and supplies weapons for testing in combat conditions. Its commercial director, Ranno Pajuri, said Ukrainian forces widely use the company's CATA pneumatic launchers to launch long-range drones. Latvian law enforcement and prosecutors are assisting the Estonian investigation.