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GREAT FALLS, S.C. (AP) -- Authorities say a 7-year-old boy has died after he crashed his dirt bike into an 18-wheeler on a Chester County highway.

Investigators said Tristan Mericle was riding the bike on private property around 4:45 p.m. Tuesday when he veered on to state Highway 97 and was struck by the tractor trailer.

Troopers continue to investigate the crash. The 26-year-old driver of the tractor trailer was not injured.

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