The final flight that a stricken Prince took from Atlanta last week made an emergency landing after an "unresponsive male" was reported on the plane, a source with direct knowledge of the incident told NBC News.
An autopsy of the 57-year-old singer was underway Friday morning as authorities try to determine what caused his death. Results, however, won't be released for several weeks, Martha Weaver, a Midwest Medical Examiner's Office spokeswoman, told NBC News.
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Source: Prince's mysterious final flight stopped for 'unresponsive male'
Singer Prince performs in a surprise appearance on the "American Idol" television show finale at the Kodak Theater in Hollywood, California in this May 24, 2006 file photo. REUTERS/Chris Pizzello/Files
NEW YORK - FEBRUARY 15: American singer, songwriter, musician and actor Prince performing in NYC at the Bottom Line on February 15, 1980. (Photo by Waring Abbott/Getty Images)
Prince performing in Minneapolis on April 30,1990. (Photo: Frank Micelotta/ImageDirect)
American pop star Prince performing at Wembley, London, 22nd August 1990. (Photo by Graham Wiltshire/Hulton Archive/Getty Images)
PRINCE IN "ROCK IN RIO" CONCERT, BRAZIL 1992. (Photo via Alamy)
American singer-songwriter Prince performs on stage, London, 1993. (Photo by Michael Putland/Getty Images)
The Artist formerly known as Prince performing at Shoreline Amphitheater in Mountain View Calif. on October 10th, 1997. Image By: Tim Mosenfelder/ImageDirect
FOR RELEASE WITH STORY BC-ENTERTAINMENT-PRINCE - The Artist formerly known as Prince seen here in a publicity photograph, July 29. The Artist formerly known as Prince has a new album "Newpower Soul" which was recorded, pressed and distributed by his NPG records label without the assistance of a major industry label.
05/16/00 New York City The Artist Formely Known as Prince reclaims his name 'Prince' and announces public tours at his Paisley Park Studio, during a press conference in New York City. Photo by Evan Agostini/ImageDirect
UNDATED FILE PHOTO: Singer Prince. (Photo by Diane Freed)
LOS ANGELES - FEBRUARY 8: Musical Artist Prince performs at the 46th Annual Grammy Awards held at the Staples Center on February 8, 2004 in Los Angeles, California. (Photo by Frank Micelotta/Getty Images)
Singer Prince, who was presented the Vanguard Award, performs during the 36th NAACP Image Awards at the Dorothy Chandler Pavilion, Los Angeles, March 19, 2005. The award show will be telecast on the Fox televison network in the United States on March 25. REUTERS/Lee Celano ljc/MK
HOLLYWOOD - FEBRUARY 27: Musician Prince arrives at the 77th Annual Academy Awards at the Kodak Theater on February 27, 2005 in Hollywood, California. (Photo by Carlo Allegri/Getty Images)
LOS ANGELES - MARCH 19: Musician Prince performs onstage at the 36th Annual NAACP Image Awards at the Dorothy Chandler Pavilion on March 19, 2005 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)
Milan, ITALY: US singer Prince is pictured during Italian fashion house Gianni Versace show during the Spring/Summer 2007 women's collections, 29 September 2006 in Milan. AFP PHOTO (Photo credit should read STR/AFP/Getty Images)
MIAMI GARDENS, FL - FEBRUARY 04: Musician Prince performs during the 'Pepsi Halftime Show' at Super Bowl XLI between the Indianapolis Colts and the Chicago Bears on February 4, 2007 at Dolphin Stadium in Miami Gardens, Florida. (Photo by Doug Pensinger/Getty Images)
MIAMI - FEBRUARY 01: Musician Prince performs during the Super Bowl XLI Half-Time Press Conference at the Miami Convention Center on February 1, 2007 in Miami, Florida. (Photo by Evan Agostini/Getty Images)
July 7th, 2007 - Minneapolis, MN, USA - The first ten fans in line for an exclusive Prince performance at Macy's downtown received photographs of the iconic Minneapolis funk rocker. Prince performed with his band on the 8th floor at Macy's downtown during an exclusive concert launching his new per
WEST HOLLYWOOD, CA - FEBRUARY 25: Recording artist Prince leaving the 2007 Vanity Fair Oscar Party at Mortons on February 25, 2007 in West Hollywood, California. (Photo by Evan Agostini/Getty Images)
PASADENA, CA - JUNE 01: Singer Prince performs onstage during the 2007 NCLR ALMA Awards held at the Pasadena Civic Auditorium on June 1, 2007 in Pasadena, California. (Photo by Kevin Winter/Getty Images for NCLR)
LOS ANGELES, CA - FEBRUARY 10: Singer Prince on stage at the 50th Annual GRAMMY Awards at the Staples Center on February 10, 2008 in Los Angeles, California. (Photo by Lester Cohen/WireImage)
THE TONIGHT SHOW WITH JAY LENO -- Episode 3737 -- Air Date 03/27/2009 -- Pictured: Musical guest Prince performs during the Mercedes Benz outdoor concert series on March 27, 2009 -- Photo by: Paul Drinkwater/NBCU Photo Bank
US singer Prince performs on October 11, 2009 at the Grand Palais in Paris. Prince has decided to give two extra concerts at the Grand Palais titled 'All Day/All Night' after he discovered the exhibition hall during Karl Lagerfeld's Chanel fashion show. AFP PHOTO BERTRAND GUAY (Photo credit should read BERTRAND GUAY/AFP/Getty Images)
NEW YORK - JUNE 08: Prince attends the Apollo Theater's 75th Anniversary Gala at The Apollo Theater on June 8, 2009 in New York City. (Photo by George Napolitano/FilmMagic)
Prince Tour 2011
US singer and musician Prince (born Prince Rogers Nelson) performs on stage at the Stade de France in Saint-Denis, outside Paris, on June 30, 2011. AFP PHOTO BERTRAND GUAY (Photo credit should read BERTRAND GUAY/AFP/Getty Images)
A representative had said he was not feeling well at his Thursday night show in Atlanta and his health worsened after he boarded a plane after midnight for Minneapolis. He was reportedly suffering from the flu, and had to cancel other shows.
The private jet he was on was diverted about 300 miles before reaching Minneapolis to Moline, Illinois, according to flight records and statements made by Prince's publicist last week.
The only flight scheduled from Atlanta to Minneapolis — and with a diversion to Moline — was a Dassault Falcon 990 jet operated by Executive Jet Management "Jet Speed."
The flight took off at 12:51 a.m. ET April 15, and according to records, began an unscheduled landing to the Quad City International Airport in Moline at 2:01 a.m.
Records show that the plane had landed in northwestern Illinois after descending about 45,000 feet in about 17 minutes.
The Moline Fire Department told NBC News it received a call for Emergency Medical Services to respond to the airport at 2:15 a.m.
A source said that the plane had radioed in a medical emergency for an "unresponsive male."
Deep tragedy. I'm so sorry for your loss Minneapolis. We will try and cheer you up for at least a little while tonight. #RIPPrince
Shocked and soooo sad!!
#RIP PRINCE #music #legend #gonetoosoon https://t.co/KlEBPPl40U
I wish I could have expressed my love for him before he left. https://t.co/drlyFNWF9X
Today we lost a true artist. Thank you #Prince for all the music you put into this world. #RIP https://t.co/4yZ6Cb5hMb
Prince was a true gentleman, a king among men. He was as sharp and as talented as they come. I'm so glad I was lucky enough to work with him
RIP Prince. The only person I ever saw a crowd part for.
Rest easy, legend ❤️ #RIPPrince
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While the closest hospital is Trinity Moline, an emergency official said that the facility is not normally staffed or equipped to handle more severe medical issues.
When contacted by NBC News, the hospital said it treated no patient by the name of Prince Rogers Nelson — the artist's full name. Another nearby hospital, Trinity Rick Island, also said it did not take in such a person.
A Prince spokesperson previously said that he was treated for the flu in Moline and released later that day.
Flight records show that the same plane departed Moline at 11:57 a.m. and arrived back to the Twin Cities at 12:45 p.m.