In the first case, a driver was arrested for allegedly passing lewd comments and making obscene gestures to a girl near ISBT-17 here, a police statement said.
The accused was later released on bail.
In another incident, a person was arrested for allegedly threatening and passing objectionable comments on a girl in the Sector-40 area, they said.
A Case under various sections of IPC was registered against him at the Sector 39 police station.
In the third incident, three motorcycle-borne youth sped away after passing insulting comments to a girl near the roundabout of Sectors 32/33/45/46.
A case has been registered against all the three unidentified persons and efforts are on to trace them, they said.
In the fourth incident, a woman alleged that an unidentified caller threatened and passed objectionable remarks against her, police said.
A case under various sections of IPC has been registered against the accused at the Sector 26 police station.
An investigation into all the cases is on, they said.
