Police are searching for two teenage boys suspected in an armed robbery Tuesday night at a Mobil gas station in central Evanston.

The two teenagers entered the gas station, 1950 Green Bay Road, at about 9:30 p.m. and demanded cash from the gas station attendant while flashing a metallic object, said Evanston police Cmdr. Joseph Dugan. The attendant responded by hitting a panic alarm, Dugan said.

After receiving the money, the teenager fled with another boy who was acting as a “lookout.”

Police recovered an eight-inch knife from the area where witnesses reported seeing one of the teenagers throw an object to the ground while fleeing northbound on Green Bay Road, Dugan said. Detectives are processing the knife for DNA.

The gas station owner estimated as much as $150 was stolen, Dugan said.

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