He admitted, however, that Rohingya had been hidden away in some parts of the Mu Koh Tarutao National Park.
The Rohingya are a Muslim minority from Myanmar, where they are denied citizenship. Many have fled their homeland in recent years following violent clashes with Buddhists.
"We are now dismantling tents used by the illegallabour agents. We will also increase patrols," Manopas said.
He said the chiefs of the national parks in border zones had been instructed to pay close attention to secluded areas of the parks because they were at risk of being used by human traffickers.