At 3:19 pm Tuesday, Contra Costa County firefighters responded to a report of a motorcyclist down in the roadway at Lone Tree Way and Blue Rock Drive in Antioch.
Upon arrival, they located a man who appeared to have been struck by another vehicle laying in the roadway. CONFIRE and Antioch Police immediately shut down Lone Tree Way in the westbound direction at InShape Gym.
The driver in another vehicle stayed on scene and was speaking with police along with another witness.
No further information was provided at the scene as Antioch Police were still investigating.
Check back for updates.