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At 7:49 pm Monday, the East Contra Costa Fire Protection District and Brentwood Police responded to a report of a bicycle crash in the 2400 block of Spyglass Drive in the City of Brentwood.
It was reported that a female bicyclist who was not wearing a helmet had crash and sustained a major head injury.
Engine 52 arrived on scene and requested a medical helicopter to transport the female.
No other information was available and Brentwood Police were investigating the crash.
