Overnight, Ukrainian drones attacked one of the largest arsenals in Russia, causing a powerful detonation in the town of Toropets in Russia's Tver Oblast, a source in the Security Service of Ukraine (SBU) told the Kyiv Independent.

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 fire and detonation have occurred in the town of Toropets in Russia’s Tver Oblast, following a drone attack on the night of 17-18 September. Source: Kremlin-aligned Russian news agencies RIA Novosti and TASS;