UPDATE: Bicyclist stabbed to death by driver after being struck in Dana Point, California

A bizarre and violent incident is under investigation after Southern California authorities say a bicyclist died after being hit from behind while riding on Pacific Coast Highway in the Dana Point area, then attacked by the driver that hit them. The Orange County Fire Authority responded to a call of a cyclist being hit by a car near Crown Valley Parkway and East Pacific Coast Highway around 3 p.m. According to the Orange County Sheriff's Department, the cyclist – later identified as 58-year-old Michael Mammone – was hit from behind by a white Lexus, and after the crash, the driver of the Lexus got out of the car and assaulted the cyclist with a knife. More LiveNOW from FOX streaming video