Serious multi-vehicle crash shuts down Interstate 495 in Chelmsford

CHELMSFORD, MASS. (WHDH) - Interstate 495 in Chelmsford was closed in both directions Monday afternoon due to a multi-vehicle crash with serious injuries, officials said.

All travel lanes on the northbound side of the highway at Route 3 were temporarily closed. The highway has since been reopened.

All southbound lanes were blocked off to allow for a medical helicopter to land at the scene.

At least one person was flown to the hospital with serious injuries.

No additional details were immediately available.

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