CLEVELAND -- Several people, including an Ohio State trooper, were hurt in a four-vehicle crash Wednesday night.

It happened while a traffic stop was underway at 9:27 p.m. on I-90 East near Carnegie Road.

As the trooper returned to his vehicle, authorities say a 2002 Ford Taurus "failed to use caution upon approach of an emergency vehicle" and struck a 2012 Acura TSX from behind. The Acura then collided with the trooper's patrol car before, which was pushed into the vehicle involved in the traffic stop -- a 2008 Toyota Highlander.

The driver of the Taurus, a 20-year-old Cleveland woman, was taken to MetroHealth Medical Center with undisclosed injuries. Her passenger, an 18-year-old Cleveland man, refused treatment at the scene.

Also treated at the scene for minor injuries was trooper Steven Hill, of Ashland.

The driver of the Acura, a 29-year-old man from Parma, was not hurt. The driver in the Highlander, a 57-year-old Cleveland man, was also unharmed.

The right two lanes of I-90 were closed for approximately 90 minutes as crews cleared the wreckage.

Investigators say speed is a suspected factor in the crash.