Sydney- Indonesia is set to own up about arming pro-Jakarta militias that brought death and destruction to East Timor both before and after the 1999 United Nations-supervised referendum that gave the tiny half-island its independence, a leaked report said Friday.

The acknowledgement that officials and army officers engaged in an "organized campaign of violence" is contained in a report prepared by a commission set up by both the Indonesian and East Timor governments that was leaked to The Sydney Morning Herald.

It says Indonesia should take "institutional responsibility" for the murder, rape, torture, arson and forced deportations that followed the independence vote.

Indonesia invaded the former Portuguese colony in 1975 and annexed the territory the following year.

The subsequent long-running insurgency and violence prompted Australia to muster an international force which, with Jakarta's permission, supervised the exit of Indonesian troops and the transfer of authority to the UN.

The Commission of Truth and Friendship Report is due to be released jointly by Indonesian President Susilo Bambang Yudhoyono and East Timor President Jose Ramos-Horta on Monday. (dpa)