Four boats carrying migrants from Africa capsized overnight in waters off Yemen and Djibouti, the UN migration agency said Friday. At least two people died, and 186 others were missing.

Two of the boats capsized off Yemen late Thursday, said Tamim Eleian, a spokesperson for the International Organisation for Migration. Two crewmembers were rescued, but 181 migrants and five Yemeni crewmembers remain missing. Two other boats capsized off the Djibouti around the same time, Eleian said.