An elderly pedestrian was taken to S.F. General with life threatening injuries after a cyclist struck him in the crosswalk at the busy intersection of Castro and Market Streets around 8 a.m. this morning. According to police, the biker may have run a red light as he came down the hill on Castro and crossed Market Street.

Witnesses on the scene said both the cyclist and the pedestrian were left unconscious after the collision. Although that fact couldn't be confirmed by the Fire Department, the cyclist was also taken to S.F. General to be treated for his injuries. Rescue workers estimated the pedestrian was at least 65 years old.