A seriously injured anti-government protester cries after an explosion blew off his lower left leg during clashes with Thai police in front of parliament in Bangkok, Thailsnd, on Tuesday, Oct. 7, 2008. The exact source of the explosion was not immediately known. (AP Photo by Wason Wanichakorn)

Anti-government demonstrators transport the injured in the back of a pick-up truck after riot police shot tear gas into a crowd of protesters blocking Parliament in Bangkok October 7, 2008. Thai police fired tear gas at anti-government protesters on Tuesday, clearing them from a road to Parliament after they had vowed to stop Prime Minister Somchai Wongsawat delivering his maiden policy speech. At least 50 people were injured, three seriously, hospital officials said. (Reuters Pictures)

An injured anti-government protester asks for help in front of Parliament in Bangkok Tuesday, Oct. 7, 2008. Police fired gear gas Tuesday at several thousand demonstrators attempting to block access by lawmakers to Parliament, heating up a political crisis that has gripped the country for six weeks. (AP Photo by Wason Wanichakorn)