Over 50 people are missing off the coast of Yemen after human traffickers "deliberately drowned" refugees on Thursday, the UN Migration Agency said.
Almost 200 refugees are believed to have been "thrown" into the sea by smugglers.
"They were in a boat with smugglers, who dropped them at sea before arriving at the shore. Some people have disappeared. But others were actually buried by their friends on the beaches," the International Organization for Migration's chief for Yemen, Laurent de Boeck, told Al Jazeera from Brussels.
The incident was the second such incident in 24 hours. On Wednesday, over 120 people were forced into the sea by the Yemeni coast, the IOM said.
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