Kotte Municipal Council Opposition Leader Sugath Appuhami was arrested by Welikada Police on Friday (08) afternoon.
Appuhami was arrested over the clash at the Council premises which was happened on Thursday(07), the police said.
He was undergoing treatment at the Colombo National Hospital at the time of arrest.
Appuhami had filed a complaint with the police saying that he was attacked by a group including Mayor Janaka Ranawaka during a demonstration staged yesterday against alleged corruption within the council.
Mayor Janaka Ranawaka was arrested this morning by police over the complaint filed by the opposition leader.