Agencies in Jakarta – Police on Bali have detained four members of the Indonesian Democracy Party (PDI) who were planning to hold a political "long march" between Bali and Jakarta, a report said.

The police yesterday questioned the four, including the plan's initiator, Roch Basuki Mangunprojo, in Badung, Bali, according to the daily Suara Pembaruan.

Bali's deputy police chief, Brigadier-General Suroyo Bimantoro, was quoted as having warned the march would be dispersed by force. The 1,200-kilometre journey had been planned in an effort to consolidate the party, which has been split since last year into two camps, Mr Mangunprojo said this month. One organiser, Juniar, said her group were "still planning to go ahead".

Bali and east Java are strongholds of PDI members loyal to ousted party leader Megawati Sukarnoputri, who are boycotting the march.

Meanwhile, Surabaya prosecutors yesterday sought up to eight years' jail for two activists of the illegal People's Democratic Party - Dita Indah Sari, 32, and Coen Husein Pontoh - on subversion charges.