IN THE ANDAMAN SEA OFF THAILAND — A wooden fishing boat carrying several hundred desperate migrants from Myanmar was spotted adrift in the Andaman Sea between Thailand and Malaysia on Thursday, part of an exodus in which thousands of people have taken to the sea in recent weeks with no country willing to take them in.

Cries of “Please help us! I have no water!” rose from the boat as a vessel carrying journalists approached. “Please give me water!”

The green and red fishing boat, packed with men, women and children squatting on the deck with only plastic tarps to protect them from the sun, had been turned away by the Malaysian authorities on Wednesday, passengers said.

They said that they had been on the boat for three months and that the boat’s captain and crew abandoned them six days ago. Ten passengers died during the voyage, and their bodies were thrown overboard, the passengers said.