A Massachusetts state trooper was struck by a vehicle early Sunday morning in Milton, Massachusetts.
According to authorities, the police officer was responding to a car accident when another passing car collided with them between exits 3 and 4 on I-93.
All four cars involved are significantly damaged and have been towed from the scene.
Massachusetts State Police say the officer was transported to a Boston hospital.
The severity of his injuries is unknown at this time.
All but one lane of travel was closed for hours, but traffic should clear soon.
The accident is under investigation.