At least 29 teenage migrants were deliberately drowned by a people smuggler in Yemen, the UN's migration agency says.
They were among 120 people who were deliberately pushed from a boat into the sea by the smuggler who apparently feared arrest.
Some 27 survivors were found on a beach by the International Organization for Migration (IOM) on a routine patrol.
Twenty-two are missing while the rest have moved on, the IOM said.
It added in a statement that the average age of the Somali and Ethiopian passengers on the boat appeared to have been 16. They had been hoping to reach countries in the Gulf via war-torn Yemen.
"The survivors told our colleagues on the beach that the smuggler pushed them to the sea, when he saw some 'authority types' near the coast," explained Laurent de Boeck, the IOM Yemen Chief of Mission.
The smuggler has already returned to Somalia to pick up more migrants to bring them to Yemen on the same route, they told the IOM.
"This is shocking and inhumane," Mr de Boeck said. "The suffering of migrants on this migration route is enormous. Too many young people pay smugglers with the false hope of a better future."
Despite conflict and a dire humanitarian situation, Yemen is still seen by many Africans as a gateway to the rich Gulf states or Europe, and thousands make their way there every year in crowded boats.
Around 55,000 migrants have left the Horn of Africa to come to Yemen so far this year, more than half of them under the age of 18 and a third thought to be female, the IOM estimates.
Many others also try to reach Europe via Libya and the Mediterranean Sea.
Zambia's hopes of becoming only the second African nation to win the Under-20 World Cup are over after a 3-2 defeat to Italy on Monday.
A thrilling quarter-final tie in Suwon, South Korea, was settled in extra-time by a goal from Luca Vido.
The Zambians paid dearly for giving the Italian play-maker the freedom of the Zambian penalty area in the second period of extra-time.
The Zambians will also be kicking themselves for failing to take advantage of playing against 10 men following the expulsion of Giuseppe Pezzella just before half-time.
Zambia got off to a dream start at the Suwon World Cup stadium when Patson Daka scored after just three minutes.
But five minutes after the break, the Italians equalised when Riccardo Orsolini headed past Mangani Banda for his fourth goal of the tournament.
Six minutes from time Fashion Sakala's superb strike looked to have won it for the reigning African champions.
But with a place in the semi-finals tantalisingly close, a glorious free-kick by Federico Dimarco four minutes later sent the game into extra-time.
With penalties looming, Vido broke Zambian hearts when he put away one of the many chances that littered this thrilling contest.
At least 34 migrants, some of them young children, have drowned after falling into the sea off the Libyan coast, Italy's coastguard says.
Rescuers say up to 30 people are missing after a hotel in central Italy was hit by an avalanche, apparently triggered by an earthquake.
Italian Prime Minister Matteo Renzi's heavy referendum defeat on Sunday has left the country facing political and economic uncertainty.