Ukraine’s military said Saturday it sank a submarine in Russian-controlled Sevastopol, attacked a southern Russian airfield and hit oil depots and fuel and lubricant storage facilities in Belgorod, Kursk and Rostov regions.

“A Russian submarine went to the bottom of the Black Sea,” the defense ministry said in a post on X, formerly Twitter, naming the vessel as the B-237 Rostov-on-Don attack submarine.

The military’s general staff said the attack on the Sevastopol port also significantly damaged four launchers of the S-400 anti-aircraft Triumf defense system.

There was no immediate comment by Russia on the Sevastopol attack.

In other overnight attacks, the military said it hit an ammunition depot at the Morozovsk airfield where Russian forces stored guided aerial bombs among other equipment, as well as several oil depots and fuel storage facilities.

“Russian combat aviation must be destroyed wherever it is, by all effective means. It is also quite fair to strike at Russian airfields. And we need this joint solution with our partners — a security solution,” Ukrainian President Volodymyr Zelenskyy wrote on the Telegram messaging app.

The Ukrainian president has repeatedly called on his Western allies for permission to use their weapons for long-range attacks on Russia, in addition to striking military targets close to the border.

He said Saturday that Russian forces had used over 600 guided aerial bombs to attack Ukraine in the past week.

The attack on oil depots and fuel and lubricant storage facilities in Belgorod, Kursk and Rostov regions set fire to at least two oil tanks, according to the Ukrainian military report.

In Russia, local officials reported that tanks at a fuel storage depot in the Kamensky district of Rostov region caught fire because of a drone attack.

The regional governor of Belgorod said Ukraine-launched drones caused a fire at an oil storage depot there, adding that the fire was extinguished and that no one was injured.

Ukraine has dramatically stepped up its use of long-range drones this year to attack Russian oil facilities, attempting to damage sites fueling Russian forces and the country’s economy in Moscow’s 29-month-old invasion.