A grenade attack on anti-government protesters occupying the Thai prime minister's office wounded eight people shortly after 2 a.m. Saturday morning, officials said.
Police Lt. Col. Samreng Songsiang said he inspected the scene and the explosion was from an M-79 grenade.
There have been several bomb attacks against the anti-government movement. The latest was last Thursday and killed one person. More than 20 were wounded.