Gas Station Robbed

***UPDATE, 9:04 A.M.***Police say the suspect left the store on foot headed in a southeasterly direction, then got into a vehicle and left the area.Investigators say the suspect is a Hispanic male, 5’5″, 140 lbs., bushy eyebrows, black ski mask, dark colored handkerchief, grey long sleeve shirt, dark grey pants and light colored shoes.***ORIGINAL STORY***Columbia Police are investigating an early morning robbery.Police were called out to the Petro Mart on Rangeline around 4:30 Friday morning.Investigators say the suspect had a knife and got away with cash.There were no injuries. A K9 unit was called in to help track the suspect.No suspect description has been released.