MILFORD TOWNSHIP, PA (CBS) — Officials say three people were injured in a crash that shut down the Northbound PA Turnpike at the Northeast Extension for several hours.

Police responded to a one-vehicle crash on the northbound side of the PA Turnpike shortly after 3 p.m. Sunday.

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The accident closed all northbound lanes starting at Exit 31 (Lansdale) for several hours the Northeast Extension reopened shortly after 10:30 p.m.

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Two people were ejected from the vehicle and were airlifted with serious injuries.

One passenger remained inside the car and was taken to the hospital.

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The cause of the crash is still under investigation.