BERWYN, Ill. (CBS) — A man was shot and killed Thursday at a restaurant in Berwyn.

At 11:25 a.m., Berwyn police were called to the Jelly Jam Restaurant at 6300 W. Cermak Rd., at Highland Avenue, for calls about a shooting inside the restaurant.

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Officers found several witnesses and a man who had been a customer for the restaurant who had been shot. The man was rushed to an area hospital, where he died.

Witnesses described the gunman as an African-American male standing 5 feet 8 inches tall with a slender build. He was wearing a black jacket with a white or light-colored hoodie underneath, dark ants, and a purple mask.

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After the shooting, the suspect ran from the scene north on Highland Avenue and west through a yard. Police set up a perimeter and put up a helicopter to try to find him, but failed to do so.

Police said the incident appears to be isolated.

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Berwyn police asked anyone with information to call the Criminal Investigations Unit at (708) 795-2160.

CBS 2 Chicago Staff