(KMOV) -- St. Charles police are investigating a second armed robbery in two days at convenience stores.
Wednesday night, a man dressed in black coveralls held up the Mobil station at 5th Street and I-70. The night before that, police say a man wearing a face mask used an automatic weapon to rob the Huck's convenience store on Country Club Road off Zumbehl.
No one was hurt in either crime. Both gunmen got away. Police are still investigating whether the crimes are connected.
Call Crimestoppers with tips.