KK, a well-known singer, died on May 31 following a final concert in Kolkata.

He had complained of discomfort at his hotel and was transported to the hospital, but he was unable to be rescued.

KK died of a major heart attack, according to the original post-mortem report.

His post-mortem was performed at Kolkata’s SSK government hospital.

The singer experienced a huge heart arrest and had a chronic liver and a terrible lung illness.

The musician also had “prolonged heart difficulties,” according to the source.

His post-mortem examination reportedly lasted an hour and a half and was videotaped.

Following his post-mortem examination, the West Bengal government saluted him with a gun salute at Rabindra Sadan.

CM Mamata Banerjee and members of KK’s family were in attendance.

KK’s lifeless remains will be flown to Mumbai on June 2, and his funeral will be held on June 2.

KK had a string of successes with Emraan Hashmi, including ‘Tu Hi Meri Shab Hai’ (Gangster), ‘Zara Sa’ (Jannat), ‘Dil Ibaadat’ (Tum Mile), and a slew of others.

Emraan told, “I woke up to this heartbreaking news today. I had such an amazing time collaborating with KK on all our songs. They will always hold a special place in my heart and so will he. KK has gone too soon. It is the end of an era.”