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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