The unprecedented operation allegedly took place on May 2 near the Russian port of Novorossiysk in the Black Sea.

A Russian Su-30 fighter jet was destroyed by a sea drone strike carried out by Ukraine’s military intelligence, marking the first time a sea drone takes down a jet, Ukraine’s military intelligence said on May 3.

The intelligence agency, HUR, said the unprecedented operation took place on May 2 near the Russian port of Novorossiysk in the Black Sea and published the video of the strike. The strike was carried out by Group 13, a special unit within HUR, using a Magura sea drone equipped with a missile warhead.

“This is the world’s first destruction of a combat aircraft by a naval drone,” the statement read.