While one of those suspects was caught a short time later, the other fled towards 33rd and Market Streets, an area near the library of Drexel University.
As a precaution, the library was evacuated while police searched the building.
Meanwhile, just after 5:00 p.m., a police car and another vehicle collided at the intersection of 34th Street and Haverford Avenue, as the officer was responding to a call concerning the delivery truck robbery.
Both the officer and the other car driver suffered minor injuries.
The second robbery suspect remains at large.
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