CHELMSFORD, MASS. (WHDH) - A deadly crash in Chelmsford Friday morning killed a driver and sent a passenger to the hospital for treatment.

The car crashed into the median on Route 495 at around 3 a.m., officials said.

The driver was pronounced dead on the scene and his sister, the only passenger, was taken to the hospital.

No other vehicles were involved. State police are investigating.

This is a developing news story; stay with 7NEWS on-air and online for the latest details.

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