Drones operated by Ukraine's military intelligence agency (HUR) hit production facilities of the state-owned Russian weapons manufacturing company "Basalt" in the city of Tula overnight on May 16, a military intelligence source told the Kyiv Independent.
Russian air defenses shot down two drones over Tula Oblast, one over Bryansk Oblast, one over Kaluga Oblast, one over Belgorod Oblast, and six over occupied Crimea at night, the Russian Defense Ministry claimed.
"Basalt" is reportedly the main defense enterprise for the production and supply of weapons and ammunition for Russia's Ground Forces, Air Force and Navy, headquartered in Moscow.
The source did not specify the scale of the consequences of the attack.
The Security Service of Ukraine (SBU) targeted an oil depot in Belgorod Oblast and an electrical substation in Lipetsk Oblast on May 13, according to the Kyiv Independent's source in Ukraine's security services.
Two days earlier, Ukraine's military intelligence claimed it was behind the attack on the oil refinery in Volgograd. The Kaluganefteprodukt oil depot and the Novolipetsk metallurgical plant were also reportedly struck by drones.