"The scurrilous remarks of MDMK leader Vaiko against the High Commissioner of Sri Lanka Prasad Kariyawasam is an offence under Sections 124A and 125 of the Indian Penal Code.
"The Tamil Nadu Police must immediately register a suo motu FIR against Vaiko, arrest him for custodial interrogation and launch his prosecution. Otherwise, the Crime Branch in the Home Ministry should register the FIR," Swamy said in a statement.
Vaiko had yesterday sought criminal prosecution of the Sri Lankan envoy under sedition charges for allegedly trying to instigate north Indians against the people of Tamil Nadu.