An elderly woman was seriously injured Wednesday, when a driver struck her as she crossed a busy San Francisco intersection.

According to the San Francisco Police Department, the collision occurred at 10:28 a.m. Wednesday, at the intersection of Powell and Clay Streets.

Police say that the driver, a 58-year-old man, was turning onto Powell when he struck the 70-year-old female victim as she crossed in the intersection's crosswalk.

She suffered life-threatening injuries in the crash, police say, and was transported to an area hospital for treatment.

The driver on the case remained on the scene, police say, but didn't provide additional details on what, if any, citations or charges might be faced by the driver.

Wednesday's incident is the second serious collision on SF city streets in as many days. On Tuesday, a cyclist since identified as 51-year-old San Francisco resident Moises Chavez was killed at the intersection of Alemany Boulevard and Silver Avenue. As in Wednesday's collision, any possible charges or citations faced by the driver are as yet unknown.

Previously: SF Cyclist Killed In Rush Hour Collision