It happened around 3:45 a.m. on Interstate 270 at milepost 1 in Adams County, according to the CSP.
The first driver struck an unoccupied CSP vehicle while the trooper was outside the vehicle. No injuries occurred. Shortly after, a second vehicle entered the crash scene and struck a second unoccupied CSP vehicle. When the second vehicle was struck, it forced a trooper over a bridge barrier and down an embankment approximately 30 feet, the CSP said in a news release.Troopers suspect that both drivers who entered the original crash scene were impaired. No injuries were reported from the suspects’ vehicles.