(Update 3 p.m.): Police say the elderly pedestrian who was hit earlier this morning by a cyclist will survive. No more details were available at this time.
Update (10:13 a.m.): Police say the cyclist who hit an elderly man in the Castro this morning might have run a red light.
Police are investigating separate accidents where two pedestrians were hit -- one by a cyclist and another who was possibly struck by a Muni bus in a hit-and-run.
Firefighters are on the scene at Castro and Market streets where a pedestrian was hit by a cyclist at about 8:05 a.m, said Officer Albie Esparza. The pedestrian was taken to the hospital with life-threatening injuries. No more details were available at this time.
The accident happened just 12 hours after a 60-year-old woman was struck, possibly by a Muni bus, in a hit-and-run accident.