Thai forensic teams dug out badly decayed skeletons from shallow graves covered by bamboo and a few of feet of dirt throughout today, according to an AFP reporter at the abandoned jungle camp in Sadao district, in Songkhla province.
"In total we have 26 bodies. As far as I know one is a woman. We still cannot tell the cause of their deaths," head of the forensic team Police General Jarumporn Suramanee told AFP.
Yesterday's grim discovery of the site, which is a few hundred metres from the border with Malaysia, again laid bare Thailand's central role in a regional human trafficking trade.
Two survivors - men aged 25 and 35 - told doctors they had spent months at the camp despite falling sick and having little to eat.
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"Both are malnourished, have scabies and lice," doctor Kwanwilai Chotpitchayanku told AFP at Padang Besar hospital.
"The older man could not walk, he had to be carried off the mountain. He hadn't eaten anything for two days before he was found. He told the translator he had a fever in the jungle for two months."
Both were rigged to IV drips and appeared frail as they lay in their ward beds.
While the cause of the migrants' deaths is not yet clear, Thailand's police chief has described the site as a "virtual prison camp" which was seemingly abandoned just days before its discovery, with the sick men left for dead.
A rescue worker said one unburied corpse belonged to the recently deceased, seeming to indicate the camp had been occupied recently.
The border zone with Malaysia is criss-crossed by trafficking trails and is notorious for its network of secret camps where smuggled migrants are held, usually against their will, until relatives pay up hefty ransoms.
Tens of thousands of migrants from Myanmar, mainly from the Rohingya Muslim minority but also increasingly from Bangladesh, make the dangerous sea crossing to southern Thailand, a well-worn trafficking route often on the way south to Malaysia and beyond.