There was no evidence of trauma on Prince's body when he was found unresponsive at his Minnesota compound, authorities in the US have said.
An autopsy was performed yesterday to try to lift the mystery surrounding the death of the superstar.
Prince Rogers Nelson was found dead in an elevator at Paisley Park on Thursday, a week after being taken to hospital with a flu-like illness that he later downplayed.
"We have no reason to believe at this point that this was a suicide," Carver County Sheriff Jim Olson told a news conference.
"But again, this is early on in the investigation and we're continuing to investigate."
The sheriff said there were "no obvious signs of trauma" on Prince's body.
"A sign of trauma would be some sign of violence that had happened. There was no sign of that at all."
The Sheriff said that the 57-year-old was alone at the premises when he died.
Obituary: His name was Prince and he was funky
Tributes pour in for 'greatest of all time' Prince
How Prince brought his Purple Reign to Ireland
The local medical examiner's office has said preliminary autopsy results will take days and the results of a full toxicology scan could take weeks.
Prince's 1984 album Purple Rain is often described as one of the greatest of all time, while hits such as When Doves Cry, Kiss, Little Red Corvette and 1999 are also considered modern classics.
His music career spanned more than three decades and he won seven Grammy Awards, sold more than 100 million records and won an Oscar for Best Original Song Score for Purple Rain.
