A boat carrying at least 150 people approaching Mauritania, capsized in the Atlantic Ocean the U.N. agency said.
The boat had been low on fuel while approaching the west African coast of Mauritania, the International Organization for Migration said in a statement. Survivors were being helped by the authorities in the northern city of Nouadhibou.
Including women and children on board, the boat had left Gambia since Nov. 27 according to the Survivors.
The Atlantic Ocean had been a major passage from West Africa to Europe for migrants seeking jobs and greener pastures.
The incident is reported as one of the deadliest since the mid-2000s when Spain stepped up patrols, and fewer boats attempted the journey.