A pedestrian was gravely injured Thursday in a hit-and-run on a Ridgeview/Webster-area street, San Diego police said.

The 57-year-old woman was crossing Federal Boulevard to the north at Euclid Avenue in a marked crosswalk when a vehicle struck her shortly after 6 a.m., according to police.

Following the impact, the motorist left the scene, Officer David O’Brien said.

Paramedics took the victim to a hospital for treatment of life-threatening injuries, including a brain bleed and a pelvic fracture, O’Brien said.

Police had no description of the vehicle or driver.