LANGHORNE, Pa. (CBS)—Police in Middletown are investigating after a roadside assistance worker is struck while changing a driver’s tire on Sunday night.

It happened on northbound Route 1 near Fox Court.

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Middletown police say the driver struck the worker’s vehicle and then struck the worker changing a person’s tire.

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The victim is in serious condition at St. Mary’s Medical Center with multiple broken bones. He is expected to survive.

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Drunk driving or speeding are not believed to be the cause.