A major Russian gunpowder factory in the Tambov region was attacked, a Ukrainian official said on Thursday, without directly claiming Ukrainian responsibility or specifying the consequences of the attack.
"The enterprise is one of the main suppliers of explosive materials for the army of the Russian Federation," Andriy Kovalenko, the head of Ukraine's Centre for Countering Disinformation, wrote on Telegram of the powder factory.
"With the start of the full-scale war in Ukraine, production at the plant increased significantly," he added, Reuters reported.
There was no immediate public comment from Russia on the attack on the factory.
Separately, Ukraine's military said it had hit the Liskinska oil depot in Russia's Voronezh region overnight.
"According to the available information, at least three strike drones hit the target. A large-scale fire broke out at the facility," a military statement on the Telegram app said.
Russian authorities had said earlier that debris from falling Ukrainian drones had caused a fire at the facility.
Ukraine and Russia have regularly attacked military production facilities deep inside each other's territory in the course of their war.