The BJP government in Assam has already claimed that the violent protests in Guwahati last week was a conspiracy of not the original protesting groups against the Citizenship Act but a nexus of "urban Naxals", a few people from the Congress and the Popular front of India or the PFI. The PFI, an Islamic group with its headquarters in Delhi and its strongest base in Kerala and a new entrant in Assam, is an outfit that appears to have drawn the attention of Assam's Health Minister Himanta Biswa Sarma. NDTV's Ratnadip Choudhury investigates. (Video courtesy: INSIDENE)