Investigators said an unidentified male entered the branch, which is located inside a grocery store, and made a threatening demand to a teller.
The suspect made off with about $4,000.
The suspect is described as a white man with brown hair, said to be in his late 40s or early 50s. He's about 5'5" tall with a thin build. he was wearing a brown and tan shirt with an eagle on it, with blue jeans and off-white sneakers.
Investigators say the man walks with a pronounced limp.
Police say the same man is a suspect in the robbery of a PNC Branch on the 400 block of Market Street back on Monday.
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