Russia has blamed Ukraine for setting ablaze one of its oil refineries, while Kyiv has accused Moscow of launching dozens of overnight strikes by unmanned aerial vehicles for the second day running.

The targeting of the fuel facility on Thursday occurred at the Ilsky refinery near the Black Sea port of Novorossiysk in the Krasnodar region, Russia’s TASS news agency reported citing local emergency services. A fuel reservoir was on fire, it said, but gave no further details.

A day earlier, a fuel depot further to the west caught fire near a bridge linking Russia’s mainland with the occupied Crimean Peninsula.

“A second turbulent night for our emergency services,” Krasnodar Governor Veniamin Kondratyev wrote on Telegram, confirming tanks with oil products were set ablaze