A man, sitting in the back of a truck, holds his head after being injured from a blast inside the protest zone of an anti-government demonstration at the Makkhawan Bridge near the Government House in Bangkok on October 30, 2008. At least six members of an anti-government street movement in Thailand were wounded on Thursday when a grenade was thrown into their protest zone in the middle of the night, domestic radio and television said. (REUTERS/Stringer)

Injured people lie in the bed of a truck after being hit by a blast inside the protest zone of an anti-government demonstration at the Makkhawan Bridge near the Government House in Bangkok on October 30, 2008. (REUTERS/Stringer)