Police say four men hit the location around 4 a.m. Friday.
It began when one of the suspects punched a guard in the face.
That suspect also displayed a handgun in his waistband, police said, and took the guard's iPhone.
Police say at least four cars were stolen.
The suspect with the gun was described by police as a male with light brown skin standing 5'8" tall and wearing a blue hoodie. The other suspects were described as black males between 19 and 21 years old.
Anyone with information is asked to contact Philadelphia police.
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