RENO, Nev. (AP) — A gunman who opened fire just outside a casino in Reno, Nevada, shot multiple people Monday morning before being taken into custody, police said.

The conditions of the victims at the Grand Sierra Resort were not immediately known, said Reno police spokesperson Chris Johnson. The gunman was being treated at a hospital, Johnson said.

The shooting was reported around 7:30 a.m. Monday outside in the valet area, Johnson said.

A spokesperson with the Washoe County Sheriff’s Department said an officer was involved in the shooting.

Reno police warned residents to stay out of the area. Multiple emergency vehicles, including several ambulances, responded outside the casino.