It happened around 4:15 p.m. on the 1400 block of Chew Avenue.
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Police say a 34-year-old man was in a wheelchair when someone stabbed him in the neck.
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He was transported to an area hospital where he was listed in stable condition.
It's unclear what sparked the attack.
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No arrests have been made.
Anyone with any information is asked to call police at 215-686-TIPS.