According to a preliminary post-mortem report, singer Krishnakumar Kunnath aka KK, died due to a massive heart attack, sources said.
SSKM hospital mentioned that the singer died due to ‘myocardial infarction’ commonly known as heart attack.
Earlier, the Kolkata Police had registered an unnatural death case over the death of the singer. According to police sources, his face and head bore injuries.
The veteran Bollywood singer breathed his last on May 31, after he collapsed at the Grand Hotel, after returning from a show in Kolkata. KK was soon rushed to a private hospital in the city, however his life could not be saved.
The final autopsy report will be published in 72 hours.
