It happened around 2:15 a.m. near the intersection of Torresdale Avenue and Devereaux Street in the Wissinoming section of Philadelphia.
Police say a man was showing off a gun around a small crowd of people after leaving a corner bar. That is when the gun suddenly went off - striking the 22-year-old woman in the chest.
The shooter fled the scene.
The victim was transported to a nearby hospital where she later died.
There is no word on the identity of the victim or the shooter at this time. Police are investigating.