A bicyclist was taken to a hospital with life threatening injuries Tuesday afternoon after a crash involving a San Francisco Municipal Railway bus.
Police responded to reports of a crash at Market and New Montgomery streets at around 4:40 p.m.
Police said it appears the male bicyclist was riding parallel to the bus when one of his tires got caught in streetcar tracks.
The bicyclist was thrown under the bus and was run over by its rear wheels, according to police.
The bicyclist was taken to San Francisco General Hospital.
Anyone who witnessed the accident is asked to call police at (415) 575-4444 or send a tip via text message to TIP411.