CHELMSFORD (CBS) – One person died and another was seriously injured following a head-on crash on Interstate 495 in Chelmsford.

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Around 6:40 a.m., the driver of a 2000 Ford Focus was driving on I-495 South when, for unknown reasons, they crossed the median and slammed into a 2017 Toyota Camry on the northbound side of the road near Exit 33.

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The driver of the Ford Focus was declared dead at the scene. An ambulance transported the driver of the Toyota Camry to Lahey Clinic with serious injuries.

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All travel lanes on 495 North were closed for reconstruction following the crash, but opened back up just before 9:30 a.m.