People tend to an injured street vendor after a bomb blast in Bangkok November 13, 2008. A bomb thrown at a rally of Thai market vendors protesting over new rental contracts in Bangkok wounded 13 people, police and witnesses said on Thursday. The incident had nothing to do with an anti-government movement whose supporters have been occupying the official compound of the prime minister since August, police said. (REUTERS/Stringer)

Bangkok metropolitan officers, center in uniforms, examine the bomb blast site at the middle of the intersection as protesters look on in Bangkok, Thailand, Thursday, Nov. 13, 2008. A blast wounded 13 people in Thailand's capital early Thursday when assailants hurled an explosive device at market vendors who had gathered to protest a rent hike at the government-owned facility, police said. (AP Photo/Apichart Weerawong)

Thai protesters look on near the bomb blast site at the middle of the intersection in Bangkok, Thailand, Thursday, Nov. 13, 2008. (AP Photo/Apichart Weerawong)