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PHILADELPHIA (CBS) — A car involved in a police pursuit struck a woman who was sitting on the steps of a North Philadelphia church Thursday night. It happened at Broad and Allegheny around 9 p.m.

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Investigators say the four suspects inside the car were involved in a robbery on the 1900 block of North 7th Street. Three of them are now under arrest.

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The search is on for the fourth suspect.

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The woman suffered serious leg injuries.