Mandya: A purported video of sangh parivar activists who were on their way to a 'Sankirtana Yatra' organised as part of Hanuman Jayanti in Srirangapatna on Sunday, intercepting Muslim youths travelling on bikes and threatening them to chant 'Jai Shri Ram' has gone viral on social media platforms, prompting the police to registered a suo motu case in this regard.