Two chemical tankers were struck by drone attacks in the Black Sea, leaving at least seven crew members unaccounted for, emergency teams said.
Rescue teams have been conducting search-and-rescue operations in the area to locate the missing seafarers. Officials have not released further details on the number of people aboard each vessel, the nationalities of the crew, or the condition of those who may have survived.
It was not immediately clear who carried out the drone attacks or what type of drones were used. Maritime investigators are expected to examine the damaged vessels and debris recovered at the scene to determine the cause and sequence of events.
The incident drew concern for shipping safety in the Black Sea region, where commercial traffic is frequently subject to geopolitical and security pressures. Authorities said they would provide additional information as the search continues and the investigation advances.