An FIR was filed on Tuesday against ruling DMK MP S Gnanathiraviam and several others in connection with an assault here on a pastor, police said.
The DMK has sent a show cause notice to the MP seeking his explanation and warned of disciplinary action if the directive was not complied within seven days.
The attack on pastor Godfrey Noble on Monday, allegedly by supporters of the MP was reportedly due to 'differences' between two groups associated with the Tirunelveli Church of South India (CSI) Diocese, in matters related to administration.