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.

Ukraine has repeatedly targeted border regions such as Bryansk, Kursk and Belgorod. The attack on Tver, about 500 kilometers from the border, is not as common, but is an example of what Ukrainian officials have repeatedly said they want to do in order to hit Russian military infrastructure that could be used to attack Ukraine.

Local authorities have partially evacuated residents of Toropets in Russia’s Tver Oblast after a mass drone attack overnight caused a large fire, Tver Oblast Governor Igor Rudenya claimed on Sept. 18.

A Ukrainian drone attack caused a massive explosion at a Russian ammunition depot in the Tver region. The explosion was reported to be so powerful that it resembled the detonation of 200-240 tonnes of high explosives.

A massive drone attack on Russia's Tver region to the northwest of Moscow overnight forced authorities to partially evacuate residents of a town and shut schools and kindergartens in a neighboring municipality.

A substantial Ukrainian drone attack in Russia's Tver region ignited a massive explosion and led to partial evacuations. Unverified reports and media reveal a huge fireball in the night sky and minor earthquake detections.

In Toropets, Tver region, Russia, a fire broke out during the night of September 18. The fire occurred against the backdrop of a drone attack and ongoing air defense operations in the region, according to the governor of the Tver region Igor Rudenya.