According to local media, it is still unclear why the mob attacked and beat the policeman.
Delhi Police have launched an investigation after a video of a police chief being mercilessly assaulted by a crowd of people inside Anand Vihar police station started going viral on social media on Saturday.
About 10 to 12 people surrounded the officer and assaulted him, the video shows.
The police chief is seen begging for forgiveness although it is unclear why, but the assailants continue to beat them.
According to some reports, it is not known why the police chief was beaten.
Police began searching for the accused and officials said strict action would be taken once they were arrested.