Drones have hit two ships in Bulgaria's economic zone in the Black Sea, the government's press office says. Prime minister Rumen Radev has called an urgent meeting with officials over the incident.
The defence ministry, interior ministry, transport ministry and environment ministry have been invited to attend, along with representatives of the president's office and the security services.
The meeting starts at 11:15, and the prime minister will speak to reporters at the start of it.
Updated (06.10, 10:28): Russian drones carried out the attack, local media report. One ship sank, killing two sailors, while 11 people were rescued. The damaged ship EMIL drifted toward Bulgarian waters, and the air force spotted it off Shabla. President Iliana Yotova scrapped a planned trip to Veliko Tarnovo over the incident.
Follow-up: Ship sinks after drone attack 80 miles off Bulgaria's Byala, 18 crew rescued
Updated (06.10, 13:11): Prime minister Rumen Radev says the rescue operation is taking place 70 miles east of the town of Byala, not 80 miles as first reported. Local media say two people were hurt in the attack and are being taken to Varna, not killed as earlier reported. A ship sailing under the Togolese flag sank, and a second vessel, carrying wheat, caught fire on board. Its crew of 11 Turkish and 7 Indian nationals were evacuated and rescued. Defence minister Dimitar Stoyanov is named in the report, and checks for possible oil spills and pollution are continuing, using two helicopters from Krumovo air base and a Su-25 jet.