A law enforcement source told CBS News on Wednesday that prescription drugs were found in Prince’s possession and at his home at the time of the music icon's death. The source also said that the local sheriff's department has contacted the DEA about assisting with the investigation into the singer's death.
The Carver County Sheriff's Department told ET that they have no update at this time and denied that the DEA has been contacted in the investigation. The Midwest Medical Examiner’s office has not released any information about the singer’s autopsy, which was performed on Friday, including whether or not toxicology reports indicate that drugs played a role in Prince’s death.
WATCH: 'Saturday Night Live' Honors Prince With Retrospective Tribute
The singer was found dead at 57 in an elevator on his Paisley Park estate in Chanhassen, Minnesota, last Thursday. Just a week earlier, his plane was forced to make an emergency landing in Moline, Illinois, where he was transported to a nearby hospital.
ET later confirmed that Prince was unresponsive when the plane landed, and TMZ reports that the singer had to be carried off the plane by his bodyguard and was treated for a drug overdose at the hospital. According to TMZ, Prince was given a "save shot," which is administered to counteract the effects of an opiate.
WATCH: Prince Was Home Alone at Time of Death, No Signs of Suicide or Trauma, Sheriff Says
On Friday, shortly after Prince’s autopsy had been completed, Carver County Sheriff Jim Olson held a press conference to give an update into the ongoing police investigation surrounding the untimely death of the legendary musician.
"We have no reason to believe at this point that it's a suicide, but it's early on in the investigation," Olson said. "Prince is a very private person and I don't think it would be unusual for him to be there by himself."
When asked if he knew if Prince had been taking any medication -- including the painkiller Percocet -- Olson would not comment. "I am not able to confirm that all," he stated, adding that investigators will be "gathering medical records" and talking to "people that [were] close to him."
A source very close to the situation told ET that Prince was battling the flu, which turned into walking pneumonia. The "Purple Rain" singer was also dealing with a hip injury and had a problem with Percocet, according to the source. We are told his issue with the powerful narcotic began years ago, shortly after he underwent hip replacement surgery in 2010.
WATCH: Inside Prince's Private Memorial: It Was a 'Beautiful Ceremony to Say a Loving Goodbye'