Bulgaria Prime Minister Radev said two merchant vessels were struck by drones at
about 0300 local time on Oct. 6 inside Bulgaria’s Black Sea exclusive economic
zone. Both ships were damaged; one cargo vessel has sunk with crew unaccounted
for, the other had 18 crew rescued and several injured. Radev described the
attack as an unacceptable violation of international law and said the situation
is making Black Sea navigation exceptionally difficult. Bulgarian authorities
are conducting search-and-rescue operations in the area.