As per Laurent de Boeck, IOM chief in Yemen, fearing an arrest the survivors pushed migrants into the coast as some type of authority was in their line of vision. "But others were actually buried by their friends on the beaches", de Boeck told Al-Jazeera, adding that it's the first time the group had documented such cases in the region.
The organisation uncovered bodies of 29 of migrants in shallow graves on a beach on Wednesday.
The passengers' average age was around 16, the IOM said.
Yemen is in the midst of a protracted civil war and an outbreak of cholera, but migrants and refugees continue to arrive in their thousands, hoping to pass through and reach wealthy Middle East countries such as Saudi Arabia, Kuwait, Qatar and the UAE.
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More than 30,000 of these new migrants were under 18 years of age. "Twenty-five passengers (wounded) of the boat are now being treated on the coast of Yemen", told AFP a spokesman of the organization.
The U.N. migration agency says five migrants are dead and another 50 are reported missing after smugglers forced them from a boat off the coast of Yemen. The suffering of the migrants on this route is vast.
This journey is especially hazardous during the current windy season in the Indian Ocean.
The IOM estimates to 55 000 the number of migrants -a third of them women - arrived in Yemen from the Horn of Africa since the beginning of the year. "Smugglers are active in the Red Sea and the Gulf of Aden, offering fake promises to vulnerable migrants".
As per reports, more than 111,000 migrants arrived on the shores of Yemen past year and in 2015 the figure was 100,000. The other route used by migrants to reach Europe is through the Mediterranean Sea. Too many young people pay smugglers with the false hope of a better future. In March, Somalia's government blamed the Saudi-led coalition fighting in Yemen for an attack on a boat that killed at least 42 Somali refugees off Yemen's coast.