Assam Police today registered a case of sedition against three activists in an apparent attempt to quell the ongoing protests against the controversial Citizen Amendment Bill-2016. The bill, passed by the Lok Sabha on Tuesday, aims to grant citizenship rights to non-Muslim migrants from three neighbouring countries. The three -- Dr Hiren Gohain, Akhil Gogoi and Manjit Mahanta -- are spearheading the protests in Guwahati.