SOFIA: Eleven sailors were missing at sea on Tuesday from a ship sunk by a drone attack off the coast of Bulgaria, the second deadly sinking of a cargo vessel in the area in a week, prompting Bulgaria to summon Russia's ambassador.
Two cargo ships were hit by drones overnight and one was sunk, Bulgarian officials said.
Bulgaria stopped short of explicitly accusing Russia of carrying out the attacks but Prime Minister Rumen Radev said their outcome "benefits the Russian Federation."
There was no immediate comment from Moscow on the incidents.
