According to Russian officials, Ukraine launched drones against several Russian regions in the first hours of May 1, and unofficial Russian news agencies reported a fire at the Ryazan oil refinery after the attack.
Pavel Malkov, governor of the Ryazan region, which borders Moscow District in its northwestern parts, said there were no casualties in the drone attacks there.
Russian Telegram channel Baza, which is close to the security services, said the attack sparked a fire at the Ryazan oil refinery.
The refinery, which is owned by Rosneft, processes about 5.8% of Russia's total crude. It has often been the target of air attacks by Ukraine.
The governors of the Kursk and Voronezh regions in southwestern Russia, which border Ukraine, also reported drone attacks on their territory, saying there was no damage or casualties.
Russia rarely discloses information about the full impact of Ukrainian attacks on its territory and infrastructure.
Kiev officials say targeting Russia's military, energy and transport infrastructure undermines Moscow's war effort. / BGNES
