SOFIA, October 13. /TASS/. Two sailors were injured as unidentified drones attacked the Maltese-flagged merchant vessel Chelsea 3. The attack with three drones occurred roughly 14 nautical miles off the Bulgarian coast in the country’s exclusive economic zone, maritime.bg reported.

The crew of the 136-meter-long vessel sent a distress signal on Monday night, as the ship stayed afloat, while the injured sailors and the other crew members were evacuated to Varna on board border patrol boats.

The news portal did not provide more details.