Guwahati, September 30 (IANS): The Special Investigation Team (SIT) of the Assam Police, assisted by the Crime Investigation Department (CID), has intensified its probe into the mysterious death of iconic singer Zubeen Garg in Singapore, summoning several individuals linked to the North East Festival for questioning. On Tuesday, Deputy Superintendent of Police Sandipan Garg appeared before CID officials in Guwahati. Earlier on Monday, musician Shekharjyoti Goswami and festival organiser Amritprabha Mahanta were also interrogated for several hours. CID sources confirmed that at least eight other persons connected to the North East Festival, where Zubeen Garg was scheduled to perform, were also examined. Zubeen Garg, revered across Assam and the North East for his music and cultural contributions, tragically passed away in Singapore on September 19, sending shockwaves through the region and sparking calls for justice.