On Thursday night, SBU sea and air drones hit the Russian coast guard base on Lake Donuzlav, a law enforcement source told Interfax-Ukraine.

"Last night, the occupying naval forces of the Russian Federation conducted exercises to protect the waters of Lake Donuzlav in Crimea. Thanks to the SBU drones, these exercises became a failure, because the Russians could not even defend their base, not to mention the waters of the lake," the agency's interlocutor said .

He noted that as a result of a combined attack by sea and air drones on the Russian Coast Guard base, the headquarters with a control center, an ammunition and equipment warehouse, an electrical substation, technical structures, and enemy firing positions were hit and disabled.

"This is another reminder to the enemy that Ukrainian Crimea is turning into a trap for the Russians, where they will be systematically destroyed," the source added.