A Ukrainian drone strike overnight ignited a significant fire at an oil depot near Russia’s Black Sea city of Sochi, Russian authorities reported on Sunday, as cross-border attacks between the two nations continued.

According to Krasnodar regional governor Veniamin Kondratyev, the fire began after fragments from a downed drone struck a fuel tank. More than 120 firefighters were deployed to contain the flames. Footage circulating on social media showed large columns of smoke rising from the site.

In response, Russia’s civil aviation agency, Rosaviatsia, temporarily suspended flights at Sochi Airport.

Further north, officials in the Voronezh region stated that a separate Ukrainian drone strike injured four people.

Russia’s Defense Ministry claimed its air defense systems intercepted 93 Ukrainian drones flying over Russian territory and the Black Sea overnight.

Meanwhile, a Russian missile hit a residential neighborhood in Mykolaiv, southern Ukraine, injuring seven people, according to Ukraine’s emergency services.

Ukraine’s air force reported that Russia launched 76 drones and seven missiles on Sunday. Of those, 60 drones and one missile were intercepted. However, 16 drones and six missiles reached targets in eight different locations.

These tit-for-tat attacks follow one of Ukraine’s deadliest weeks in recent months. On Thursday, a combined Russian drone and missile barrage killed 31 people, including five children, and injured more than 150 others.

The escalating violence comes as U.S. President Donald Trump set a deadline of August 8 for progress in peace talks with Russia. On Thursday, he announced that special envoy Steve Witkoff is en route to Russia to push for a ceasefire, warning of new economic sanctions if meaningful progress is not achieved.