Sudhakar Badgujar, a Nashik Municipal Corporation corporator, was brought to Mumbai Naka police station this afternoon and placed under arrest, a police official said.
The incident took place on March 22 when Sena activists allegedly ransacked the pandal of the event and damaged chairs, in Bodhale Nagar locality.
Following the incident, both sides had lodged cross complaints in the police station.
Rahatkar had allegedly expressed support for separate Marathwada and Vidarbha states, within days after then Advocate General Shreehari Aney triggered a row by voicing support for separate Marathwada state in Jalna.