Police are searching for a hit-and-run driver who left a woman in critical condition overnight. 

Chicago police said the 68-year-old woman was crossing the street at North and Lotus avenues when a car hit her. The woman was taken to a local hospital with fractured legs and a cut on her head. 

The driver did not stop to help. 

Police said the driver may have been in a gray, four-door sedan, possibly a 2004 to 2006 Hyundai Sonata. The wanted vehicle might have front-end damage on the driver's side. 

Anyone with information is asked to contact police at 312-745-4521.