The incident took place on Sunday outside a Twin Peaks sports bar in Waco, TX. Five rival motorcycle gangs were reported to have been involved in what started out as a fist-fight in the bathroom but soon escalated with knives and chains in the restaurant, and an armed shootout in the parking lot outside.
All nine of those killed were said to be members of the Cossacks and Bandidos, the latter rated by the Texas state government as Tier 2 alongside the Bloods, Crips and Aryan Brotherhood. Fortunately none of the bar's staff, patrons, or police on the scene were reported to have been among the nine killed or further 18 injured in the event.
For those unfamiliar, Twin Peaks is what you might call a "breastaurant" - similar to Hooters but with an outdoorsy, mountaineer vibe. The chain has over 60 locations primarily in Texas. The Waco franchise off of Interstate 35 at the Central Texas Market Place promotes a Bike Night on Thursdays that attracts motorcyclists (evidently of a certain type). Law enforcement had been aware of the rival biker gangs patronizing the establishment recently and reportedly tried to work with the bar's management to prevent violence – efforts which the McLennan County Sheriff's Department say were not reciprocated.
In the aftermath of the incident, the Texas Alcoholic Beverage Commission has suspended the bar's license for at least a week while local, state and federal law enforcement agencies deal with the aftermath. The crime scene was reportedly littered with over 100 weapons, with both police and civilian vehicles parked in the vicinity pock-marked with stray bullets.