It happened around 7:30 p.m. Wednesday on the 2300 block of Ridge Avenue.
When officers arrived, they found the 70-year-old victim with pellets from the shotgun embedded in his face and head.
He was taken to Temple University Hospital in stable condition.
Witnesses helped identify the 71-year-old man with the shotgun. They found him across the street in a third floor apartment.
He was taken into custody.
A motive for the shooting has not been determined.
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