Rescue services recovered two bodies and were still searching for one person after a fishing boat sank off Mingulay in Scotland's Western Isles early Saturday, the British coastguard said.
A lifeboat and a search-and-rescue helicopter were sent out after a distress call at 3:45 am (0245 GMT) from the emergency beacon of a fishing vessel with four crew on board, the Maritime and Coastguard Agency said.
The helicopter rescued one crew member, and the agency said the operation would be "scaled back pending further information" following the recovery of two bodies later Saturday.
"Despite an intensive search including the helicopters, lifeboat and other fishing vessels in the area, we have been unable to locate the missing fisherman," said Mark Rodaway, national operations commander for UK Coastguard.
Chief Inspector Alastair Garrow said Police Scotland would cooperate with the maritime agency in investigating the sinking of the fishing boat.