As per a report, all 13 of them were later granted bail and were given a notice under section 41 of the Indian Penal Code (IPC).
On Saturday, an indigenous Assamese youth was allegedly beaten up by two non-Assamese youths for asking for petrol at a depot in Guwahati's Kahilipara area.
Later, the members of Bir Lachit Sena surrounded the depot and forced both the non-Assamese youths to kneel down and apologize before the public.
A team of police then reached the spot and brought the situation under control.