Southeast Asia is currently battling an exodus of boat people fleeing persecution and poverty, with up to 2,000 vulnerable migrants thought to be stranded in the Bay of Bengal, many at the mercy of ruthless people smugglers.

Most are Muslim Rohingyas from the western Rakhine state in Myanmar, where they are not recognized as citizens and instead referred to as "Bengalis" or illegal immigrants from Bangladesh.

Bangladeshis, meanwhile, are also trying to escape grinding poverty.

More than 3,500 migrants have swum to shore or been rescued off the coasts of Malaysia, Indonesia, Thailand and Bangladesh since a Thai crackdown in early May on human-trafficking threw the illicit trade into chaos.

Myanmar has faced increasing international pressure to stem the deluge from its shores and deliver urgent humanitarian relief to thousands still trapped at sea.

On Friday the country's navy said it had carried out its first rescue of a migrant boat when scores of bare-chested men were found crammed into the hull of a wooden fishing vessel and taken to shore.

Myanmar officials say all 208 men are from Bangladesh and will soon be returned there. AFP wasn't able to independently verify where the migrants were from.

"We are giving humanitarian assistance to them. After that we will deport them back to the relative country," Zaw Htay, director of the presidential office, told AFP on Saturday.

"We have made contact with Bangladeshi border officials on the ground regarding the arrived persons," he added.

The rescue by the Myanmar navy comes as fears grow for migrants still stuck at sea at a time when the dry winter months are about to give way to the regional monsoon.

UN Secretary General Ban Ki-moon said finding and saving the lives of those migrants should be a "top priority".

Speaking during a visit to Hanoi, he called on regional nations to tackle the "root causes" of the current exodus at an upcoming conference in Thailand later this month.

"But when people are drifting on the sea, how we can search and rescue them and provide life saving humanitarian assistance, that is a top priority at this time," he said.

At home Myanmar's Rohingya face daily discrimination and a raft of restrictions. Many live in displacement camps after scores of Rohingya were killed in 2012 during communal bloodshed with local Buddhists -- an event that caused a spike in people to flee on boats.

Most migrants aim for Malaysia and Indonesia using dangerous and lucrative smuggling networks that criss-cross the region.

Over recent years, hundreds of thousands of Rohingya and Bangladeshis have left their homes in what has become the largest regional sea migration since the end of the Vietnam War.

The smugglers largely went about their business unhindered until the crack down by Thailand on smuggling networks in the country's south, which caused many gang masters to abandon their victims.

Other smugglers off the coast of Myanmar have held off making the crossing because of the crackdown. (++++)

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