One merchant ship has sunk and its crew is missing after a drone attack in the Black Sea, Bulgarian officials say. A second vessel - carrying grain - was also hit within Bulgaria's exclusive economic zone, Prime Minister Rumen Radev said. Its crew of 18 were rescued. Radev did not say who was behind the attacks, which come as Russia intensifies strikes in the Black Sea as part of its war against Ukraine. Moscow has not commented on the latest incident, a day after it was accused by Ukrainian President Volodymyr Zelensky of striking a civilian vessel carrying corn. Air and sea drones were involved in the attacks at about 03:00 (23:00 GMT), some 70 miles (112 km) off the coastal town of Byala in eastern Bulgaria, Radev said.
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