BUKIT WANG BURMA, Malaysia -- Malaysian forensics teams exhumed a body from a shallow grave Tuesday at an abandoned jungle camp used by human traffickers, the first of what police predicted would be more grim findings as they search through a cluster of illicit hideouts near the border with Thailand.
Authorities say there are 139 suspected graves in the mountainous jungle where northern Malaysia meets southern Thailand, a remote area that trafficking syndicates used as a transit point to hold migrants and refugees. Most were believed to be members of Burma's persecuted Rohingya Muslim minority and impoverished migrants from Bangladesh.
"Forensics teams have found one human body so far," said Mohammad Bahar Alias, a senior police official from northern Perlis state. Digging continued at other graves, which police said were marked by sticks or stones. "There are graves all over this area."
Malaysian police took journalists to one of 28 abandoned camps found after a regional crackdown was launched on human trafficking earlier this month.
The camp, reached after a 2-hour hike up a steep jungle path, appeared to have been abandoned a while ago, police said. A jungle prison remained that included at least two large wooden pens wrapped with barbed wire.
"These structures were believed to be used as human cages," said Mohammad Bahar. He said the camp may have held up to 300 people. It also contained a watch tower and a cooking area littered with dishes and pots. During the tour, authorities pointed out what looked like the skeletal remains of a jaw on the ground.
"We think it belongs to a human," said Mohammad Bahar.
The body that was found Tuesday was wrapped from head to toe in a white cloth. He said it would be taken to a state hospital for an autopsy.
The discoveries in the northern Malaysian state of Perlis follow similar revelations earlier this month in Thailand, where police unearthed dozens of bodies from shallow graves on the Thai side of the border. Thai police Maj. Gen. Puthichart Ekkachan said 36 bodies were found there in seven abandoned camps.
The discoveries have exposed hidden networks of jungle camps run by human smugglers, who have for years held countless desperate people captive while extorting ransoms from their families. Most of the victims were part of a wave of people who fled their homelands to reach countries like Malaysia, where they hoped to find work or live freely.
Malaysian Home Minister Zahid Hamidi said police are probing the possibility that government officials, including some from the Forestry Department, may be involved in the human trafficking syndicates.
He said several people have been detained and are under investigation, but didn't provide further details.
As Southeast Asian governments have launched crackdowns in recent weeks amid intensified international pressure and media scrutiny, traffickers have abandoned their camps and boats at sea to avoid arrest.
This month, more than 3,000 people -- about half of them from Bangladesh and half Rohingya from Burma, also known as Myanmar -- have landed in Indonesia, Malaysia and Thailand, according to the U.N. refugee agency. Thousands more are believed to be trapped at sea in boats abandoned by their captains.
Human rights groups and activists say the area along the Thai-Malaysia border has been used for years to smuggle migrants and refugees, including Rohingya Muslims, a long-persecuted minority in predominantly Buddhist Burma.
In many cases, they pay human smugglers thousands of dollars for passage, but are instead held for weeks or months while traffickers extort more money from their families back home. Rights groups say some have been beaten to death, and The Associated Press has documented other cases in which people have been enslaved on fishing boats.
Malaysia and Indonesia announced last week that they would provide shelter for up to one year for migrants recently found or still stranded at sea. The U.S. has said it will settle some of them permanently.
Thailand on Tuesday joined Malaysia and Indonesia in launching naval patrols of its territorial waters, saying it will open a "floating base" near its maritime border with Burma where migrants in need of medical assistance can receive treatment at sea. The operation, which includes seven naval ships and eight aircraft for aerial searches, will run initially for two weeks, said Supreme Commander Gen. Worapong Sa-nganetr.
The Rohingya, numbering around 1.3 million in Burma, have been called one of the most persecuted minorities in the world. Long denied basic rights, they have been driven from their homes in mob attacks in Burma's Rakhine state several times since 2012.
More than 140,000 were displaced and are now living under apartheid-like conditions in crowded camps. More than 100,000 others have fled by sea.