Prince's death is being investigated as a possible overdose.
The musician passed away suddenly at his Paisley Park, Minneapolis, home last week and investigators are looking into the possibility that drugs were involved and if a doctor was with him when his private plane made an emergency landing in Illinois six days before his death, according to a new report.
At the time Prince's representatives said he was treated in a hospital for flu before being discharged but it has since been claimed that first responders administered a "save shot" on the runway, which is typically administered to counteract the effects of opiates.
Chief Deputy Jason Kamerud of the Carver County Sheriff's Department told E! News, "We're continuing to investigate the circumstances of Prince's death. The ME will provide toxicology results with her findings. I expect it to be a few weeks before we have her report(s)."
The news comes amid reports Prince had been addicted to painkiller Percocet for years because of problems with his hips.
And it has also been claimed the 'Kiss' singer had been diagnosed with AIDS six months before he died but refused medication on religious grounds.
Friends of the late star - who was a Jehovah's Witness - told the National Enquirer magazine: "He was in bad shape. Doctors told Prince his blood count was unusually low and that his body temperature had dropped dangerously below the normal 98.6 degrees. He was totally iron deficient, very weak and often disoriented. He rarely ate and when he did it all came right back up."
However, Prince - who was said to have been diagnosed with HIV in the 1990s - is said to have told his friends: "God can - and will - cure me."