SAN MATEO, Calif. (KGO) -- The CHP is investigating a fatal crash involving a Good Samaritan on southbound Highway 101 at 3rd Avenue in San Mateo.
The accident happened just before 2 a.m. Officers say a man got out to help a driver who had gotten into a single-vehicle collision. The Good Samaritan was struck and killed by another vehicle.
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The CHP says the driver in the initial accident suffered major injuries. He was taken to the hospital.
Investigators haven't identified either driver.
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All lanes of the highway were reopened after 6 a.m.