A Pennsylvania State Police trooper was hit by the driver of a vehicle while at the scene of a crash in Butler County on Monday.

In a news release posted to social media, state police said the trooper was taken to a local hospital in stable condition after the crash, which happened around 2 p.m. on Interstate 79 north at the state Route 422 exit. Authorities said the trooper was at the scene investigating a two-vehicle crash when they were hit.

State police said the driver of the vehicle who hit the trooper remained at the scene. The trooper's identity was not released on Monday night. No other information was shared in the news release posted to social media. 

Law enforcement is investigating.