Twelve people have been injured in clashes between supporters of Tripura's ruling BJP and Tipra Motha -- the new party formed by erstwhile royal Pradyot Kishore Manikya Debbarman -- at the state's Sepahijala district. Among the injured are several policemen, who were trying to bring the mob under control. Several two-wheelers have been vandalised and Rathindra Debbarma, the officer-in-charge of the Takarjala police station is among the injured.