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Authorities say a 21-month-old baby has died after being injured in a major pileup last weekend on Interstate 5 north of Los Angeles.

The California Highway Patrol tells KERO-TV that the child — whose name has not been released — died Wednesday.

Several people were injured in a series of crashes involving up to 50 cars amid thick fog on March 23 near Gorman.

The CHP said Saturday that the child was properly strapped into a car seat at the time of the crash.

The pileup happened along the Grapevine section of I-5, which carries traffic over mountains between greater Los Angeles and the San Joaquin Valley.