https://cdnph.upi.com/ph/st/th/6161784661440/2026/upi_com/8540eba8db1dfc77946e124d23cac9c5/v1.5/UN-refugee-agency-144-people-dead-or-missing-off-Mauritania.jpg" /> The U.N. refugee agency said Tuesday that 144 refugees and migrants have died or were missing after incidents off the coast of Mauritania last week.