A fatal collision prompted the closure of all lanes of westbound state Highway 4 in Pittsburg on Tuesday afternoon, according to the California Highway Patrol.
The crash was reported just before 2:20 p.m. on westbound Highway 4 between Loveridge and Somersville roads.
All lanes were closed as of shortly after 3 p.m., and the coroner's office has been requested at the scene.
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