Long Beach police are looking for the driver of a grey SUV who hit a pedestrian, briefly stopped and then fled the scene Friday night at 20th Street and Atlantic Avenue.

The pedestrian, a woman, was walking across 20th Street in a marked crosswalk but against a red light when the driver travelling southbound on Atlantic Avenue on a green light hit her at about 9:10 p.m., Det. Jennifer Arzola said.

When officers got to the scene, they found the woman unconscious with injuries to her upper body, according to Arzola. Paramedics took the woman to a local hospital in critical condition.

The driver of the older model grey SUV, only described as a man, stopped temporarily after the crash but then fled southbound on Atlantic Avenue before officers got there, Arzola said.

Collision detectives are still investigating.

Police ask that anyone who witnessed the incident to call the Collision Investigations Detail at 562-570-7355. Anonymous tips can be submitted by calling 800-222-8477 or by visiting www.lacrimestoppers.org.