The California Highway Patrol said a man died following a crash on southbound Interstate 280 near the Trousdale exit in Millbrae Saturday.
Traffic was impacted and a Sig Alert went out at 4:40 p.m.
According to the California Highway Patrol, a man carjacked another person in San Bruno, when he crashed into a tree along the freeway.
The car burst into flames and spread so quickly, crews said the man was not able to get out.
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CHP said the driver was traveling at 80 m.p.h. at the time of the crash.
There is no further information at this time.