Protesters call march against Thai PM for next week

"PAD plans a major rally on Friday, July 14 ... before marching to Government House to demand that Prime Minister Thaksin resign," said Suriyasai Katasila, a spokesman for the People's Alliance for Democracy.

PAD spearheaded months of protests against Thaksin earlier this year, accusing him of corruption and abuse of power over a tax-free stock sale that earned his family 1.9 billion dollars.

Thaksin, 56, called snap elections on April 2 in hopes of ending the protests, but the polls proved inconclusive after the opposition staged a boycott.

The Constitutional Court has since invalidated the polls, and is now considering charges that Thaksin's Thai Rak Thai and the opposition Democrat Party broke electoral laws during the campaign.