A Thai colonel at the heart of allegations the army towed hundreds of migrants to sea and left them to die has denied any abuse.
At a hearing of the Thai parliament's foreign affairs committee yesterday, Col Manat Kongpan said the migrants were stripped to the waist when they were first detained on Thai soil, but were not beaten or whipped, as some media reports alleged.
"It's true that they were asked to take off their shirts," said Col Manat, who is head of the Internal Security Operations Command (ISOC), a Cold War-era anti-communist arm of the military, in the southwest coastal province of Ranong.
"We gave them food and asked them where they wanted to go. They told us to Malaysia and Indonesia," he told the committee.
Reporters were allowed to observe the hearing for the first 30 minutes.
"The villagers in Ranong then helped them repair their boat and towed it out to sea. The villagers also prepared food to last them for 10 days. It's not the villagers' fault the refugees got lost," he added.
It is not clear why ISOC, a shadowy army structure revived after a 2006 military coup, has become involved with the migrants, rather than the immigration or border police who normally process illegal aliens.
Col Manat's account is at odds with that provided by the Arakan Project, a small non-governmental organisation dedicated to the plight of the Rohingya, a Muslim minority from Arakan state in northwest Burma, bordering Bangladesh.
The Arakan Project said that in December Thai security forces detained around 1,000 Rohingyas on Koh Sai Daeng, a remote tropical island in the Andaman Sea, after intercepting them on their way south through Thai waters.
They were kept under armed guard, given very little food and reported being kicked and beaten with sticks, the Arakan Project said.
Then, in two separate incidents in late December the military forced 992 Rohingyas onto boats without engines before towing them far out to sea and abandoning them, it said. Of the 992, 550 are missing and feared drowned, it added.
The group also detailed one incident in which four men who refused to board one of the engine-less vessels were thrown into the sea with their hands bound.
The Arakan Project said its information came from interviews with survivors picked up by the Indian coastguard on the Andaman Islands, an Indian-administered archipelago 750km northwest of the Thai resort island of Phuket.
Thai Prime Minister Abhisit Vejjajiva, who has made much of bolstering the rule of law and respect for human rights in his month in office, has pledged to investigate but issued a denial yesterday of any wrongdoing on the part of the military.