Video captured smoke rising from Toropets, in Tver region on Sept. 18, after Ukrainian drones attacked the town some 300 miles inside of Russia, Kyiv officials said.

Renovated in 2018, the facility in Toropets is estimated to have stored tonnes upon tonnes of military goods, including explosives, artillery shells and ballistic missiles.

Ukrainian drone attack on Russian arsenal triggers explosions, fire, and evacuation. US defense stocks react to reports.