Accompanied by 500 supporters, Chalad filed the complaint with the national police against the leaders of the People's Alliance for Democracy (PAD) and three opposition parties, as well as the 98 prominent people who last week signed a petition calling for royal intervention in the political stand-off.

They had violated Article 63 of the Constitution and Article 116 of the Criminal Law by trying to scuttle the general election and remove caretaker Prime Minister Thaksin Shinawatra, he said.

Chalad will also file a complaint with the Election Commission asking that the three opposition parties be dissolved because of their decision to boycott the general election.

He will also ask the Thai Journalists Association to pressure several national newspapers, which he believes have an anti-Thaksin slant, to review their editorial content.

If police do not take action before Tuesday, when the PAD plans to stage another mass rally against the government, he will lead a nationwide protest against the anti-Thaksin alliance, he said.

The middle class and academics do not own the country, one of his supporters said yesterday. Many lower-income people support Thaksin, Chantarat Thatpicha-amporn added.