JAKARTA, Nov. 12 (Xinhua) -- Non-governmental organization Greenpeace on Thursday intensified their action against forest destruction in Indonesia.

    "As many as 50 Greenpeace activists from several countries chained themselves in seven working excavators belonged to PT RiauAndalan Pulp and Paper (RAPP), a pulp and paper company operating in Kampar Peninsula of Sumatra province," said Hikmat Soeriatanuwijaya, the Media Campaigner of Greenpeace Southeast Asia in a statement.

    They also unfurled a 20 x 30 meter-banner to prevent the excavators resuming their work, which they called as destroying forest.

    The action is follow up of the previous one on Nov. 9 when the organization released fresh evidence of pulp and paper giant the Asia Pacific Resources International Holdings Limited (APRIL) that rampantly destroys peat land forests in the same area.

    Greenpeace called Indonesian President Susilo Bambang Yudhoyonoto immediately order the Forestry Ministry to revoke APRIL's permits to clear the carbon-rich deep peat forests.

    APRIL maintains to the public and to Greenpeace that they are not illegally clearing deep peat in the peninsula. Yet, the NGO said that it has evidence to the contrary that shows excavators ripping down forests and strong indications that it is on deep peat.