According to local media reports, it is still not clear why the mob attacked and beat up the police officer.
Delhi police have opened an investigation after a video of a head constable being mercilessly assaulted by a crowd of people inside the Anand Vihar Police Station started going viral on social media on Saturday.
About 10 to 12 people surrounded the officer and assaulted him, as seen in the video.
The head constable is seen pleading for forgiveness although it is unclear what for, but the attackers continue their beating.
According to reports, it is unclear why the head constable was beaten.
The police have started looking for the accused and officials have said that strict action will be taken once they are arrested.