On the statements of police officials, including the woman constable, a case was registered against five youths, they said.
Four had been arrested and the fifth one was on the run, police said.
A youth during a cultural programme in Mallan village here yesterday allegedly passed indecent remarks against a woman constable.
When ASI Ram Singh objected, he left the place and came back with his four associates and they allegedly thrashed Singh, police said.
