Waco Police on Guard After Biker Gang Shootout

Police were on alert Monday for any retaliatory attacks after a chaotic shootout between rival biker gangs left nine people dead and at least 18 more wounded outside a Texas restaurant. Waco police Sgt. W. Patrick Swanton said authorities had received threats against law enforcement "throughout the night" from biker groups and stood ready to confront any more violence resulting from Sunday's gunfire. About 170 people were arrested on charges of engaging in organized crime. Earlier, Swanton said 192 people had been arrested but later revised that number downward. Parts of downtown Waco were locked down after the shooting, and officials stopped and questioned motorcycle riders. Agents from the FBI and the federal Bureau of Alcohol, Tobacco, Firearms and Explosives were assisting local and state authorities.