Surveillance video from the fast-food chain shows the man pull through the drive-thru in a red Ford pickup truck at about 7:30 p.m. March 19. “At some point, he became upset about a refund,” the Oklahoma City Police Department said.

In the video shared by police, the customer appears to have a conversation with an employee before handing a Church’s Chicken bag to the worker inside. He continued talking with the worker, video shows, before the drive-thru windows were closed. The man then drove away.

Sometime after, the man drove back to the restaurant in a white Mercedes sedan, police said. This time, he went inside the restaurant, pointed a gun at a worker’s head and threatened to shoot the male employee.

Authorities did not report any injuries during the incident.