The Zanesville Police Department is investigating a early morning robbery at the Speedway gas station at 930 Blue Avenue. Detective Sergeant Ric Roush says around 3:30 a suspect entered the station, threatened the cashier and demanded the store’s cash and fled. The suspect was last seen getting into what appeared to be an older white Oldsmobile. It was last seen entering the I-70 westbound on-ramp. Roush describes the suspect as a whilte male, 25 to 35 years of age, short hair around six feet tall and 150 pounds. The suspect was wearing a black overcoat, black pants and a toboggan. Anyone with information is asked to call Zanesville Police at 740 455-0700.