It happened around 10 p.m. on the 2400 block of Ridge Avenue.
According to Chief Inspector Scott Small, a 50-year-old store owner was pulling down his security gates to close his business for the evening when he was shot.
The victim was rushed to an area hospital where he's currently listed in critical condition.
Police say the victim's 19-year-old daughter was inside the store when the shots rang out. She was not injured.
It's unclear what sparked the shooting.
Anyone with any information is asked to call police at 215-686-TIPS.