Ukrainian border guards defending a Black Sea island defiantly told an invading Russian warship to “go f–k yourself” when asked to surrender and were killed when the warship opened fire.

The 13 guards were posted on the small but strategic Snake Island off Ukraine’s southeastern border when they were approached by two vessels on Thursday, according to Ukrainian media outlets.

“This is a Russian warship, I repeat. I suggest you surrender your weapons and capitulate otherwise I will open fire. Do you copy?” the Russians told the border guards.The 13 guards were posted on the small but strategic Snake Island off Ukraine’s southeastern border when they were approached by two vessels on Thursday, according to Ukrainian media outlets.

The Russians contacted the guards and identified themselves as a “Russian warship,” demanding that the Ukrainians surrender or they would open fire, according to audio of the exchange.

“This is a Russian warship, I repeat. I suggest you surrender your weapons and capitulate otherwise I will open fire. Do you copy?” the Russians told the border guards.

“Just in case,” another guard responds.

The guard then turns up the volume on his comms and bluntly responds, “Russian warship, go f–k yourself.”

The Russians reportedly bombarded the 42-acre island with barreled guns from the warship. They then bombed the island with aircraft. 

Video apparently taken by one of the guards killed during the attack shows the guard outdoors, wearing a military helmet. He can be heard yelling out and hitting the ground as loud gunfire erupts.

The Russians reportedly bombarded the 42-acre island with barreled guns from the warship. They then bombed the island with aircraft. 

Video apparently taken by one of the guards killed during the attack shows the guard outdoors, wearing a military helmet. He can be heard yelling out and hitting the ground as loud gunfire erupts.