It happened around 4:15 p.m. on the 1400 block of Chew Avenue.
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.
No arrests have been made.
Anyone with any information is asked to call police at 215-686-TIPS.