An Indiana State Police trooper was seriously injured in a crash Friday night on Interstate 65 near Crothersville.

Trooper Michael Thiron  was responding to a crash  at about 9 p.m. where a vehicle had struck the cable barrier in the median of the highway. As he switched lanes, with his emergency lights activated, Thiron’s police car was hit by a semi-trailer driven by 30-year-old Patrick Gregory of Indianapolis, according to reports from Sgt. Stephen Wheeles, ISP spokesman. The police car was spun about and pushed into the cable barrier.

Thiron was taken to Schneck Medical Center with possible head injuries and was released Friday night. Gregory was uninjured.

Traffic was slowed in the area for about two hours.

The crash remains under investigation.