Cambridge Police are looking for the driver of a car that hit a 77-year-old woman in a wheelchair early Sunday on Columbia Street near Lincoln Street, then drove off, leaving her with critical injuries for which she is still hospitalized.

Police say the woman was headed south on the side of Columbia around 4:40 a.m. when hit - apparently head on, by a driver heading north, who then continued towards Somerville, via Webster Avenue and Prospect Street.

Police say the car was a 1996-1999 Taurus, either green or blue and it likely to have damage to its front bumper and headlights and possibly its hood.

Anybody with information can contact Officer Christopher Sullivan at 617-349-3307.