Man robs gas station at gunpoint, taking only a full tank of gas Updated 8:42 AM; MONROE COUNTY, MI – Police are investigating an armed robbery of a Monroe County gas station where the suspect stole a full tank of gas and nothing more. Police were called at 8:47 p.m. Friday, April 9, to the Lightning Quick Gas & Go, 640 Saline St., in Petersburg for the reported armed robbery, according to the Monroe County Sheriff’s Office. The station’s clerk told police that a man, who was a regular customer at the station, pointed a gun at him and ordered him turn on the gas pumps, police said.