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BUCKS COUNTY, Pa. (CBS) – Bensalem Police are teaming up with the FBI to track down what they are calling a serial robber. Police say the suspect hit two banks and a shop in a two week span between Dec. 14th and 31st.

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They were all within a couple miles of each other in Bensalem and Trevose areas.

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The man got away with cash in each of the robberies.

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Police say he concealed his face each time and had a black semi-automatic gun.