Prince was reportedly treated for a drug overdose six days before his death on Thursday, April 21st, according to TMZ.

Prince’s jet plane made an emergency landing in Moline, IL, last Friday due to a medical emergency. His rep told Variety at the time that the singer was struggling with the flu.

According to the TMZ report, doctors gave Prince a “safe shot” after he was rushed to the hospital, something reportedly given to counteract the effects of opiates. Doctors apparently advised that Prince stay in the hospital for 24 hours — he left, however, after three hours.

Authorities found Prince unresponsive when they arrived Thursday morning, responding to a 911 call. First responders tried CPR, but were unable to revive the pop star and he was pronounced dead at 10:07 a.m.

Police are continuing to investigate the circumstances surrounding Prince’s death. His autopsy will be performed on Friday.

The Carver County Sheriff’s Office also released the transcript of the 911 call; that can be read at Variety.com.

Members of the rock community have taken to social media to pay tribute to Prince. A selection can be seen below:

RIP PRINCE..ONE OF THE SADDEST DAY’S TO SAY THE LEAST. HE WAS THE TRUE DEFINITION OF A REAL ARTIST. pic.twitter.com/wt3wA6NHe0

— ❌ Nikki Sixx ❌ (@NikkiSixx) April 21, 2016

Now Prince…..?? This year has been absolutely BRUTAL! Prince, Bowie, Frey, Emerson, Kantner, Bain, Martin, Shandling….Carpe Diem everyone! 💜

— Mike Portnoy (@MikePortnoy) April 21, 2016

I just heard Prince has left us...omg

— Charlie Benante (@skisum) April 21, 2016

RIP Prince. Rock n Roll Heaven sure is putting together an amazing supergroup. https://t.co/xz25U5W5kQ

— Lzzy Hale (@LZZYHALE) April 21, 2016

PRINCE, sad to say, has passed on!!! He was a Giant. My deep condolences go out to his family, friends and fans.

— Gene Simmons (@genesimmons) April 21, 2016

So shocked to report the death of Prince. Truly one of a kind genius. Electrifying live. His influence is everywhere pic.twitter.com/N26nvnNt79

— Paul Stanley (@PaulStanleyLive) April 21, 2016

Dearly Beloved. We are gathered here today to talk about this thing called life RIP #Prince #57 #CarlAnderson #DavidBierk

— Sebastian Bach (@sebastianbach) April 21, 2016

What do we do now? PRINCE. No. I hope you weren't in much pain...your music saved me time and again.

— Duff McKagan (@DuffMcKagan) April 21, 2016

Seems like I’m in a dream. Prince dead at 57. There are no words to describe this loss.

— Sharon Osbourne (@MrsSOsbourne) April 21, 2016

This is what it sounds like when doves cry. #prince https://t.co/S6Sb8uQm68

— Rob Zombie (@RobZombie) April 21, 2016

PRINCE - 1958 - 2O16 - Such an Amazing,Undeniable Talent - GOD BLESS - tBLSt SDMF pic.twitter.com/7ckEL3zOne

— Zakk Wylde (@ZakkWyldeBLS) April 21, 2016

R.I.P Prince...Exceptional Talent... pic.twitter.com/Fvl5W61OEv

— David Coverdale (@davidcoverdale) April 21, 2016

#Prince gone (?!?). Apparently 100% confirmed. Beyond crushed. Icon. Genius. 2 much 2 say. No words. In memory: https://t.co/0K29mVF0SX

— Alex Skolnick (@AlexSkolnick) April 21, 2016

W.T.F. ???? Why are all the great musicians dying ?
R.I.P. PRINCE

— Mick Mars (@mrmickmars) April 21, 2016

Prince was metal in our book. Did things his own way and didn't give a $hit what anyone thought #RIPPrince #legend pic.twitter.com/ubvirPee6A

— Metal Allegiance (@metalallegiance) April 21, 2016

Oh my god I can’t believe that Prince has died…he was a great great talent…RIP

— Billy Idol (@BillyIdol) April 21, 2016

I'm numb...dumbfounded...this can't be... pic.twitter.com/bt7r0s0F15

— Jeff Scott Soto (@jeffscottsoto) April 21, 2016

Speechless. RIP Prince #TrueLegend https://t.co/hUM1SQuDBO

— DJ ASHBA (@DjASHBA) April 21, 2016

RIP @Prince-Your talent is immeasurable & you will be sorely missed. May God Bless your soul. Prayers & thoughts to family, friends & fans.

— MichaelSweet Stryper (@michaelhsweet) April 21, 2016

I’m devastated to read about the sudden passing of #prince - here is my full statement - John 5.https://t.co/2UpoRAhxXH

— John 5 (@john5guitarist) April 21, 2016