Gurdip Singh was allegedly beaten up by the members of a rival group on Thursday at around 10.30 PM in connection with a dispute over the control of a Gurdwara in Amarpura area, they said.
Following which members of the other group came out in support of Gurdip and people from both the sides hurled bricks, stones and bottles at each other, the police said.
The video of the clash has also gone viral on social media.
Out of the 16 accused, four have been identified, police said.