It follows the discovery in January of a group of 98 suspected Rohingya trafficking victims, including dozens of children, who were found in pickup trucks in southern Thailand.

Tens of thousands of Rohingya have fled Myanmar since 2012, when violent clashes with ethnic Rakhine Buddhists killed hundreds.

Many head to Malaysia but often end up in smuggling camps in southern Thailand where they are held captive until relatives pay the ransom to traffickers to release them.

The latest group were stopped at Tong Sung district in Thailand's southern Nakhon Si Thammarat province.

They were heading to Malaysia in search of work, Police Colonel Anuchon Chamat, deputy commander of Nakhon Si Thammarat Provincial Police said.

"They were sitting with Thai passengers and upon inspection by authorities were found to have no travel documents," said Anuchon, adding that police have yet to determine whether traffickers were among the group.

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