SBU drones hit a Russian coast guard base on Lake Donuzlav in Crimea.
As a result of the combined attack, the following were hit and disabled: headquarters with a control point, ammunition and equipment depot, electrical substation, technical structures and firing positions.
The vulnerability of combat helicopters has translated into a high number of losses on the Russian side. In February, a report published by the London-based International Institute for Strategic Studies found that the Russian Aerospace Forces had lost 40% of their pre-war Ka-52 Hokum-B attack helicopter fleet.
Slovakia and Hungary have said they stopped receiving oil from a key supplier, Russian company Lukoil, after Ukraine last month banned the transit of resources from the Russian energy company via its territory.