PHILADELPHIA (CBS) – Police say a man was shot and killed Thursday afternoon in the West Oak Lane neighborhood of Philadelphia.

This happened on the 6700 block of North 17th Street.

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Police say the 23-year-old victim was shot once in the chest. He was taken to Einstein Hospital where he was pronounced dead around 4:40 p.m.

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The suspect is described as a man in his 20’s wearing all white clothes. He was last seen on foot heading south on 17th Street.

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The motive is unknown as the investigation continues.