The death toll from a migrant boat disaster off Yemen has climbed to 96, underscoring the growing human cost of perilous journeys across the Red Sea.

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

The vessel capsized along a heavily traveled but treacherous route for Africans transiting the war-torn country to find work in the rich Gulf states.