Warne's family had been informed of the result and had accepted the finding. Warne's body would be transferred to Australian consular officials for return to his family, deputy national police spokesperson Kissana Phathanacharoen said in a statement.

"Today investigators received the autopsy result, in which the medical opinion is that the cause of death is natural," Kissana said.

"Investigators will summarize the autopsy result for prosecutors within the timeframe of the law."

Warne, one of the finest spin bowlers of all time whose talent and personality transcended the sport, died aged 52 on Friday.

His death prompted an avalanche of tribute from and beyond the cricketing world with Australian Prime Minister Scott Morrison describing him as "one of our nation's greatest characters."