LITTLETON, MA (WHDH) — State Police responded to a fatal car crash on Route 495 northbound in Littleton on Friday.
The crash happened just before 4 p.m. near Exit 30.
Four cars were involved, one of which was a tractor trailer dump truck.
One person was killed.
Three other people were transported to area hospitals for treatment.
The cause of the crash is under investigation.
Drivers are warned to expect significant delays on both sides of the highway.
The highway remains closed.
Stay with 7News as this story develops.
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