It happened on October 25 at 1420 Locust Street.
Police say the suspect entered a suite after entering the building. He then rummaged through the offices.
According to police, he made off with a computer bag and $480 from one of the offices.
He fled in an unknown direction.
He's described as a Black male and 30 years-of-age. He was wearing a dark leather jacket, light blue denim Capri pants with a black and red stripe on the left thigh, and white Adidas sneakers with black stripes.
If you have any information about the suspect, please contact Central Detective Division at 215-686-3093/3094.
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