Myanmar police officers speak to would-be migrants below deck on a fishing boat off the western coast of Rakhine Image Credit: AFP

Yangon, Myanmar: Navy ships from two countries scoured South-East Asian waters Friday for boats believed to be carrying thousands of migrants with little food or water, and a top U.S. diplomat said Myanmar needs to shoulder some responsibility for the crisis. That's something it has been reluctant to do.

U.S. Deputy Secretary of State Anthony Blinken said Rohingya Muslims fleeing the predominantly Buddhist nation are risking perilous journeys and putting their lives in the hands of human traffickers because "they are in despair and don't see a future" at home.

They have been denied citizenship and chased off their own land. They have little access to education or adequate medical care and cannot move around freely.

"The root of the problem for those leaving Myanmar is the political and social situation on the ground," Blinken told reporters at a news conference in Yangon wrapping up his Southeast Asia tour.

"Even as we tackle the immediate humanitarian emergency - that is literally to save and rescue people, bring them back to land, get them the care that they need and treat them appropriately - we also have to get at the underlying conditions."

He said he made that point when he met with President Thein Sein, the army commander-in-chief and other top officials.

Southeast Asia is grappling with a humanitarian crisis of monumental proportions.

Fearing arrests after a crackdown on human trafficking networks in the region, captains earlier this month started abandoning boats that were packed with Rohingya Muslims fleeing persecution and Bangladeshis escaping poverty.

More than 3,600 migrants have washed ashore in Indonesia, Malaysia and Thailand since May 10, and thousands more are believed to be trapped at sea. The United Nations has warned that time is running out to save them.

Governments have been reluctant to help, worried that accepting even a few refugees would open the floodgates for more. In recent days, several navies pushed back boats packed with desperate and starving men, women and children.

The first breakthrough came Wednesday, when Indonesia and Malaysia said they were willing to shelter new arrivals as long as the international community promised to help resettle them to third countries within a year.

And in the first official rescue operation, four Malaysian navy ships were searching for boats on Friday, said navy chief Abdul Aziz Jaafar. He said three helicopters and three other ships were on standby.

Myanmar's navy found two fishing trawlers filled with 208 men during a patrol off Rakhine state, the main point of departure for fleeing Rohingya.

Zaw Htay, director of the presidential office, said Friday the men were identified as Bangladeshi and would be sent to the neighboring country.

Rohingya, numbering at around 1.3 million, have been identified by the United Nations as one of the most persecuted minorities in the world.

After Myanmar moved from dictatorship toward democracy in 2011, newfound freedoms of expression gave voice to Buddhist extremists who spewed hatred against the religious minority and said Muslims were taking over the country. Attacks that followed left up to 280 people dead. Another 140,000 Rohingya were driven from their homes and are now living under apartheid-like conditions in crowded displacement camps.

The government refuses to recognize them, regarding them as illegal migrants from Bangladesh, even though many have lived in Myanmar for generations.

It has expressed skepticism that those fleeing are actually from Myanmar and insists it is not to blame for the current crisis.

After initially saying it might boycott a meeting next week in Thailand to address the problem, it agreed Thursday to attend, saying the invitation letter did not use the term Rohingya and did not say that Myanmar was solely to blame.

Those were the conditions the government had set.

"We are ready to cooperate with other governments to resolve the ongoing problems through constructive engagement and on humanitarian grounds," Zaw Htay said.

The United States, which initially insisted it was a regional problem, has in recent days also become involved.

It is preparing to send "maritime aviation patrols throughout the region," Pentagon spokesman Lt. Col. Jeffrey Pool said Thursday, adding that the Department of Defense "is responding to this crisis and taking this seriously."

Washington has been urging governments in the region to cooperate on search and rescue operations and sheltering the migrants.

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Gecker reported from Bangkok. Associated Press writers Aye Aye Win in Yangon, Ali Kotarumalos in Jakarta, Indonesia, Eileen Ng in Kuala Lumpur, Malaysia, Martha Mendoza in Santa Cruz, California, and Matthew Pennington in Washington, DC, contributed to this report.