CHICAGO — Chicago police are searching for a gunman who shot and killed a restaurant employee on the West Side.

The shooting happened around 3 a.m. Friday at the Original Maxwell Street, located in the 3800 block of West Harrison Street, just off the Eisenhower Expressway.

Police said a male employee was working the service window at the restaurant when he was shot in the face.

“There may have been an argument between victim and offender prior to that occurring,” CPD Chief of Detectives Brendan Deenihan said.

The man was transported in critical condition to Mount Sinai Hospital, where he was pronounced dead.

No one in custody. Area Four detectives are investigating.

It was the second shooting at the restaurant in the past several months. In March, two Chicago police officers were shot while in line waiting to order food at the service window. A suspect was arrested and charges were filed. Both officers have recovered since the incident.