A Ukrainian sea drone has destroyed a Russian helicopter off the coast of Crimea for the first time.

Footage of the attack shared by HUR, Kyiv’s military intelligence, showed the drone bobbing on the seas as the aircraft manoeuvred in the skies above.

Plumes of water splashed up next to the Magura V5 drone as Russian fire hit the sea around it.

What appeared to be rockets were launched towards the first helicopter, which could later be seen plunging into the sea.

A second aircraft was also targeted in the strike, but was only damaged and was able to limp back to a nearby airfield, Kyiv said.