Jakarta – The environmental group Greenpeace said yesterday that it had documented massive illegal logging in a protected national park that houses orangutans in Kalimantan.

Activists from the Rainbow Warrior had photographed illegally logged trees turned into plywood at a mill located on the west side of Tanjung Puting national park in Central Kalimantan province, the group said in a statement.

The famed park is home to many of Indonesia's orangutans and many other rare and protected species.

It called on the Indonesian authorities to 'mobilise the relevant authorities to investigate the legality of the shipment and to stop the destruction of these ancient forests'.

A 2002 report by the World Resources Institute, Global Forest Watch and Forest Watch Indonesia said Indonesia was losing nearly two million hectares of forest – which work out to an area half the size of Switzerland – annually.