(CNN)Like some families, biker gangs tend to settle scores among themselves. Privately, if not quietly.
But on Sunday, a feud between two rival biker groups — the Bandidos and Cossacks — broke into the open in a big way.
At least nine people were killed when a fight erupted at a Waco, Texas, restaurant, with the clash escalating in minutes from fists to guns.
Eighteen people were hospitalized, according to Waco police Sgt. W. Patrick Swanton, who said that all of the victims were bikers. He declined to name the gangs involved.