to all police. they say more armed gang members may be heading to waco now, and that they should consider these groups quote, armed and dangerous. a law enforcement source also telling cnn tonight that at least four bikers may have been killed by police during sunday s shoot-out at a crowded restaurant. kyung lah begins our coverage tonight outfront in waco. reporter: cell phone video captures the carnage. bodies lying outside twin peaks restaurant in waco. a dispute in the bathroom led to nine people dead, 18 injured in what police call a bloody brawl between rival biker gangs and then a gun battle with officers. we have wounded inside. we had people stabbed. we had people shot and we had people beat. reporter: pictures show one of the biker groups, the cossacks being arrested. the others part of the bandido motorcycle club. you guys call you clubs. they call you gangs.