The Casey's General Store in the 3800 block of Highway MM was robbed Wednesday night.
At 10:50 p.m., officers with the Hannibal Police Department responded to a report of the robbery, Lt. John Zerbonia said in a news release .
Police said employees of the business reported that a white male subject wearing a dark colored jacket with a mask over his face came in and displayed a knife. They told police that he took money from the register and left on foot.
According to police, the robbery is under investigation and more information will be released as deemed necessary.
No one was injured in the incident.