The U.N. immigration agency reports that a boat carrying African migrants that capsized off Yemen's coast has killed 56 and left 132 missing, revising casualty figures released earlier.

At least 76 people have been killed and dozens are missing after a boat carrying mostly Ethiopian migrants sank off Yemen in the latest tragedy on the perilous sea route, officials said.

Dozens are missing after a boat carrying more than 150 migrants, many believed to be Ethiopian, sank in bad weather.