A UN envoy has said more than 50 mass graves have so far been found in parts of Iraq that were previously controlled by so-called Islamic State (IS).

The lane starts deep inside the forest behind a rubber tree estate in Felcra Lubuk Sireh. It takes an hour and a half to get there on a motorcycle. Walking there takes four hours.

A regional conference, with the member states of Asean and representatives from the US and the UN, is under way in the Thai capital Bangkok to discuss possible solutions to the South East Asia migrant crisis.

Malaysia is investigating 12 policemen suspected of involvement in human-trafficking camps found in the remote north of the country.

Mass graves believed to contain bodies of hundreds of migrants from Myanmar and Bangladesh found in Malaysia, media report says.

The United States, which censures Thailand for failing to act against human trafficking, called on Monday for speedy and credible inquiry into discovery of a mass grave containing more than two dozen bodies thought to be of ethnic migrants.