Authorities are looking for a man who jumped a Pennsylvania police officer and threw her down a 40-foot rocky embankment.

West Penn Township Officer Melissa Ruch had stopped Wednesday to investigate a vehicle on the side of Route 309 in Schuylkill (SKOO'-kul) County when the man assaulted her.

Police say the embankment she tumbled down is rocky and steep, and it drops about 40 feet. Police say Ruch hit the man with her stun gun and called for backup.

The man was gone by the time other officers arrived on the scene. He remained at large Thursday.

The officer was injured. Her condition wasn't immediately clear Thursday.