Prakash Bhoir, a former MLA of MNS, and Ulhas Bhoir, a Corporator of the party, were part of a group that went to the 'Shailja Bar' at about 12.30 am and ransacked it, Babasaheb Borde, Sub-Inspector of Kalyan Bazarpeth Police Station, said.
They also threatened the customers there, he said.
Based on a complaint by the bar owner, the police registered an offence and made the arrests. The motive behind the attack was not yet known, police added.
