The hunt for a man suspected of shooting a police officer in northwest Iowa has spread to Omaha.

Officers surrounded a block about a mile west of downtown Omaha on Thursday night, but Jamal Dean wasn’t found during the 90-minute search.

He’s suspected of shooting Sioux City Police Officer Kevin McCormick. Authorities believe Dean has ties to the Omaha area.

Police say McCormick pulled over a car on Monday afternoon in Sioux City. McCormick was still in his cruiser when a man stepped out of the car and opened fire with a rifle. McCormick was hit in the head by a bullet fragment. He’s been released from a hospital.

A $15,000 reward has been offered for information leading to the capture of Dean.