An historical reenactment of the infamous gunfight at the O.K. Corral turned bloody Sunday afternoon when one of the actors involved fired real bullets instead of the planned blanks, Tombstone, Ariz., marshals said.

Tom Carter of the Tombstone Vigilante reenactment group allegedly arrived late and didn’t have his six-shooter properly checked before the O.K. Corral skit. Another actor, Ken Curtis, was shot in the upper groin.

Marshals inspected Carter’s gun and determined he’d fired five shots. Tucson news station KOLD reports two of the live rounds struck local businesses, and shrapnel hit a female bystander, who refused medical treatment.

Curtis, who’s also the assistant chief of the Tombstone Vigilantes, had a bullet removed at a Tucson hospital.

“Tombstone takes pride in the safety and security of its townspeople and tourists alike and the citizens of Tombstone can be assured that stringent safety protocol will be enforced prior to allowing any further gunfight skits,” the Marshal’s Office said in a statement.

The gunfight at the O.K. Corral pit legendary lawman Wyatt Earp, his brothers, and ex-dentist Doc Holliday against the outlaw Cowboys, including the brothers Clanton and McLaury.

Here’s Tom Carter, the accidental shooter, playing Cowboy Tom McLaury, who died in the (actual, 1881) gunfight.

[Video: Tombstone Vigilantes]