An unmanned sea vehicle struck a Russian oil tanker, 'Virat' in the Black Sea on Saturday. The same tanker had been previously hit by blasts late Friday.
The crew of the tanker reported a 'drone attack' in an intercepted open-frequency radio distress call. However, they were referring to unmanned maritime drones. In a video, the crew can be heard saying, "This is VIRAT. Help needed! Drone attack! Mayday!"