PORTLAND — Portland police are investigating a daylight purse-snatching on Congress Street in which a man ripped a pink purse from a woman in a motorized wheelchair.

The woman, 52, was riding on the connector road between Federal Street and Congress streets near the Rite Aid at 290 Congress St. at 4:15 p.m. Wednesday when the man grabbed her purse and ran, police said. The woman was not hurt.

Witnesses reported the incident and ran after the man but were unable to catch him, police said. The purse contained a small amount of cash.

The robber is described as a black man, in his 20s, 5-foot-9 to 5-foot-10, 170 pounds, with short hair. He was wearing faded baggy jeans and a black jacket.