Most on board boat believed to be Pakistanis;ten bodies so far recovered, three survivors found.
An estimated 90 migrants are feared to have drowned off the coast of Libya after a smuggler's boat capsized early on Friday, leaving three known survivors and 10 bodies washed up on shore, the International Organisation for Migration (IOM) said.
Survivors told aid workers that most of the migrants on board were Pakistanis, who form a growing group heading to Italy from North Africa, IOM spokeswoman Olivia Headon said.
"They have given an estimate of 90 people who drowned during the capsize, but we still need to verify the exact number of people who lost their lives during the tragedy," Headon, speaking from Tunis, told a Geneva news briefing.
"What has been reported to us is that it's mostly Pakistanis who were on board the boat, but we still need to verify the nationalities and how many from what country," she said.
Ten bodies have washed up on Libyan shores, two of them known to be Libyans and eight Pakistanis, she said.
"I believe the Libyan coastguard is looking for other survivors off the coast," Headon added.
Another IOM spokesman, Leonard Doyle, told Reuters Television that the boat was believed to have left shore on Thursday before capsizing early on Friday morning.
LIBYA CLAMPS DOWN
Earlier security officials in the western Libyan town of Zuwara said two Libyans and one Pakistani had been rescued from the boat. They said 10 bodies had been recovered, mostly Pakistani, but gave no further information.
Zuwara, located near Libya's border with Tunisia, was a favoured site for migrant boat departures over the past two years but of late has seen only occasional departures. A statement from the Zuwara coastguard said their initial information suggested there were some 90 people on board.
Libya is the main gateway for migrants trying to cross to Europe
by sea, though numbers have dropped sharply since July as Libyan factions and authorities - under pressure from Italy and the European Union
- have begun to block departures.
More than 600,000 people are believed to have made the journey from Libya to Italy over
the past four years.
Prior to Friday's incident, some 6,624 migrants are believed to have arrived in Europe by sea so far this year and a further 246 have died, according to IOM figures.
The Libyan coastguard, which receives EU funding and training, has become more assertive in recent months in intercepting migrants and bringing them back to Libya.
Activists have criticised the policy, saying migrants often face extreme hardship and abuse in Libya, including forced labour, according to Human Rights Watch and other rights groups.
Migrants who are caught trying to cross to Italy are put in severely overcrowded detention centres authorised by the interior ministry.
By Stephanie Nebehay and Ahmed Elumami