A large-scale Ukrainian drone attack on Russia triggered an earthquake-sized blast at a major arsenal in the Tver region on Wednesday, forcing the evacuation of a nearby town, war bloggers and some media reported.

A partial evacuation order is in place in Russia's Tver region after Ukrainian drones struck a large military depot in the town of Toropets. According to a Kyiv security official, the attack was carried out by Ukraine's Security Service, along with its Intelligence and Special Operations Forces.

A partial evacuation has been ordered in Russia's Tver region after a "massive" Ukrainian drone attack sparked a fire there, the local governor has said. Igor Rudenya said emergencies services in the town of Toropets were trying to "localise" the blaze caused by falling drone wreckage. He did not say whether there were any casualties.