In brief
The sinking of a container ship struck by three maritime drones off Bulgaria’s coast triggered a coordinated response from defence, maritime and environmental agencies. Extensive seawater sampling is underway to detect petroleum products, PCBs and other contaminants, and results will be made public. The event reflects growing maritime drone activity in the Black Sea and Bulgaria’s efforts to safeguard its marine environment.
On 28 October 2026, a container vessel under a Liberian flag was struck by three maritime drones approximately 21 nautical miles southeast of Shabla, east of Cape Kaliakra, and sank around midnight. According to Bulgarian authorities, the incident occurred in the country’s exclusive economic zone and the ship carried hazardous cargo, including lithium‑ion batteries and gas oil. The sinking resulted from a sudden loss of buoyancy caused by the drone strikes, as BTA reported.
The ship carried 421 containers, many of which contained various fuels and other hazardous cargo, including lithium‑ion batteries and gas oil. BTA noted that the cargo profile heightened concerns about potential marine pollution.
All 18 crew members, 14 Filipinos and 4 Ukrainians, were rescued by the Defence Ministry and local coast guard and taken to Varna. The rescue was conducted without any reported injuries, BTA said.
Defence Ministry teams collected seawater samples from two sites in Bulgarian territorial waters and reported no visible pollution, BTA reported. The samples were taken as an initial measure to gauge potential contamination from the ship’s cargo.
Maritime Administration Executive Agency inspected the sunken vessel and indicated that the light fuel oil carried on board is expected to evaporate quickly and is unlikely to reach the Bulgarian coast. The agency stated no significant marine or coastal impact was anticipated at this stage, BTA reported.
The Environment and Water Ministry announced that the Black Sea Basin Directorate and the Executive Environment Agency will collect seawater samples at five coastal sites—Durankulak, Shabla, Cape Kaliakra, Byala and Sozopol—on Thursday. The samples will be tested for petroleum products, polychlorinated biphenyls, metals and other physicochemical indicators of water quality, BTA said. Analysis will occur in the agency’s regional laboratories in Varna and Burgas.
The ministry also planned to sample the area surrounding the sunken vessel and release the results publicly. Monitoring will continue, and authorities will act quickly if any pollution risk is identified, BTA reported.
Admiral Emil Eftimov said in a televised interview that the drones entered from the east and did not cross into Bulgarian territorial waters. He added:
We are not at war. The drones did not enter territorial waters, so we did not take action.
According to BTA, this incident marks the fifth maritime drone attack in Bulgaria’s exclusive economic zone since the start of October, a surge that has prompted the country to enhance its intelligence, surveillance and early‑warning capabilities and to acquire new anti‑drone systems.
As Bulgarian authorities continue their environmental assessment, the incident highlights the need for continuous monitoring and rapid response to protect marine ecosystems in the Black Sea.
