It appeared to be the first such attack in Bulgarian waters Bulgarian authorities on Tuesday launched a search for missing crew members of a boat that sank in its economic zone in the Black Sea after drones hit two merchant vessels. Key points and original sources are listed below.

• It appeared to be the first such attack in Bulgarian watersS1

• Bulgarian authorities on Tuesday launched a search for missing crew members of a boat that sank in its economic zone in the Black Sea after drones hit two merchant vessels. Black Sea shipping has been hit by growing fallout from the war in Ukraine in recent mo...S2