Norman Sweeney, 77, hasn't been seen since Monday afternoon, Oct. 23, authorities said.
He was last spotted along the 500 block of East Allegheny Avenue in Kensington, near Lewis Elkin Elementary School, according to PPD.
Sweeney is 6-foot-1 and 165 pounds with a thin build, gray hair, and a mustache, police said. He was wearing a black jacket, a sweater, multicolored pants with maroon stripes on the sides, and red, white, and blue sneakers.
Anyone with information should call PPD detectives at 215-686-3243 or dial 911.
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