Guwahati (Assam) [India], September 21 (ANI): Assam Chief Minister, Himanta Biswa Sarma, assured of further investigation into the singer Zubeen Garg's demise after receiving the death certificate of the singer, which mentioned the cause of death as 'drowning'. While talking to the media, CM Himanta Biswa Sarma said that the Singapore High Commission has sent a death certificate of Zubeen Garg, which mentions 'drowning' as the cause of death. 'The Singapore High Commission sent the death certificate of Zubeen Garg, and they mentioned the cause of death is drowning. After his demise, the festival organisers issued a statement, saying that Zubeen Garg suffered breathing difficulties during scuba diving. Meanwhile, thousands of emotional fans gathered at Arjun Bhogeswar Baruah Sports Complex today to pay their last respects to Assam's popular singer Zubeen Garg.