MT. VERNON, IL — Mt. Vernon police are investigating a Tuesday night armed robbery on the city’s northeast side.

According to MVPD, around 8:07 p.m. Tuesday, officers were dispatched to the Casey’s General Store at 1400 Salem Road for a report of an armed robbery. The ensuing investigation determined the offender was a heavy-set black male wearing grey sweatpants, a dark-colored hooded sweatshirt and a gator-type face mask. The offender displayed a handgun and left with an undetermined amount of cash. The offender left eastbound from the business on a bicycle. Citizens in this area are encouraged to check their security systems and advise local authorities if they may have captured images of a person meeting the description of the offender.

The offender in this case is considered armed and dangerous. Anyone with information reference this case is encouraged to contact the Mt. Vernon Police Department at 618-242-2131, the Jefferson County Sheriff’s Office at 618-244-8004 or Jefferson County Crime Stoppers at 618-242-TIPS (8477).