Multiple FIRs have been filed against North East India Festival organiser Shyamkanu Mahanta and Zubeen Garg's manager Siddhartha Sharma in Assam, CM Himanta Sarma said. He said the FIRs will be transferred to CID that will investigate Garg's death in Singapore. The 52-year-old 'Ya Ali' singer passed away after suffering complications while scuba diving on Friday.