A simple bus ride for a girl turned shocking as she soon witnessed the man sitting in front to have begun masturbating.
The girl, after initial shock, collected herself and shouted at her.
But the man shamelessly continued in his act.
It is said that even the fellow passengers were not willing to intervene.
Police said that at this point, she stood up, thrashed him and called up the police.
Police then moved in to make an arrest and also initiated the probe.
The incident took place on Tuesday when the girl was traveling from Kapashera to Vasant Kunj.
Sexual harassment on public transport or in public places, in the form of touching, flashing and masturbation, is not uncommon in the capital.>