City police are investigating four armed robberies that occurred Friday night in a span of less than three hours.
It is unknown at this time if any of the incidents are related, police said.
The first robbery occurred around 8:50 p.m. at the Sunoco on the 1800 block of Liberty Street. Police said the attendant reported that a black male wearing a ski mask pointed a handgun at him and demanded he open the register and safe. The suspect fled on foot with an undetermined amount of cash. No one was injured in the incident.
The second robbery happened around 9:18 p.m. on the 600 block of Liberty Street when a 47-year-old female pedestrian was approached by a black male with a handgun who demanded she give him his cellphone, police said. The victim was uninjured.
The third incident occurred at the Turkey Hill convenience store on the 1200 block of Lehigh Street around 10:50 p.m. Three masked men, one of whom was carrying a gun, entered the store and demanded money from the clerk, police said. The three men fled the scene on foot. No injuries were reported.
The fourth robbery occurred around 11:15 p.m. the Lukoil station on the 1400 block of West Tilgman Street. Three men with dark clothing, two of whom had handguns, demanded everyone in the store get on the floor, police said.
The station attendant, struck on the back of the head with an unknown weapon, was treated at St. Luke's University Hospital, police said.