Police are asking for the public's help in finding a hit-and-run suspect after the driver struck a wheelchair-bound woman.
The vehicle hit the 77-year-old victim Sunday at about 4:40 a.m. while traveling in the southbound lane of Columbia Street near Lincoln Street, police said.
The victim remains in critical condition at a local hospital.
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Video footage captured the vehicle, described as a 1996-1999 Ford Taurus that is either green or blue, with possible front-end damage on its bumper.
The vehicle flednorth toward Somerville on Webster Avenue and Prospect street, police said, adding that officers do not have a description of the suspect, but believe the person was alone in the car.
Anyone with information related to the incident can contactOfficer Christopher Sullivan in the Cambridge Police Traffic Enforcement Unit at 617-349-3307.