Hanover Park police are searching for two masked robbers who took cash, cigarettes, and lottery tickets from a 7-Eleven early Thursday, authorities said.
One of the suspects was armed with a pellet-type gun, police said in a news release.
Shortly after 1 a.m., the men, wearing black clothing, went into the store on the 1600 block of Walnut Avenue.
Police also are looking for a third person who may be a witness to the crime. This person left the store shortly before the armed robbery, police said.
Anyone with information is asked to contact Hanover Park Police at (630) 823-5500.