Key facts
- Two Turkish-flagged commercial vessels, Alsu and Tugberk Imamoglu, collided off Istanbul in the Sea of Marmara.
Two Turkish-flagged commercial vessels, the Alsu and the Tugberk Imamoglu, collided in the Sea of Marmara off Istanbul. Contact has been lost with the Tugberk Imamoglu and its 10 crew members, while the Alsu sustained no visible damage. Search and rescue operations are underway.

The collision highlights potential risks to maritime traffic in a critical waterway, raising concerns about the safety of crew and the security of shipping lanes, particularly given the loss of contact with one vessel and its occupants.
Two Turkish-flagged commercial vessels collided off Istanbul in the Sea of Marmara on Wednesday, with contact lost with one of the ships and its 10 crew members, the Istanbul governor's office stated.
The vessels, identified as the Alsu and the Tugberk Imamoglu, collided near the Silivri district around 3 a.m. local time. The Alsu, a chemical tanker en route to Aliaga, sustained no visible damage. However, authorities were unable to establish contact with the Tugberk Imamoglu, a bulk carrier bound for Karadenizeregli.
Coast guard ships and helicopters were dispatched to the scene to conduct search and rescue operations, which were still ongoing. The Tugberk Imamoglu is owned by Zeybe Denizcilik, while the Alsu is owned by Ozpulathane Deniz Tasimaciligi.