Air ambulance medics were called to Ozzy Osbourne's Buckinghamshire mansion in the morning of 22 July before the rocker's death was announced to the public.
Osbourne died 'surrounded by love' earlier this week, following his Parkinson's disease diagnosis at the age of 76.
The news was confirmed by a statement shared on behalf of his wife Sharon Osbourne, and their three children - Kelly, Aimee, and Jack - which read: "It is with more sadness than mere words can convey that we have to report that our beloved Ozzy Osbourne has passed away this morning.
"He was with his family and surrounded by love. We ask everyone to respect our family privacy at this time."
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Tributes to the singer from friends, family, and fellow leading figures in the music world have since begun to pour in.
A new update has now revealed that, on Tuesday morning, an air ambulance was dispatched to the Osbourne residence, where medics fought to save the heavy metal icon's life.
According to a report from MailOnline, a Thames Valley air ambulance could be seen landing in a field close to the Black Sabbath frontman's home in Jordans, Buckinghamshire, reportedly remaining at the residence for around two hours.
Residents living in the village have since spoken out about seeing the ambulance, telling the outlet that there were immediate fears for Ozzy's life.
"All of us were talking about it and wondering what had happened. We immediately feared it may be for him as he was known to be in fragile health," the unnamed resident said. "When we heard later that night that he had died it confirmed our worst fears."
A representative for Thames Valley Air Ambulance has since confirmed that a chopper was dispatched to the Osbourne home, telling MailOnline in a statement: "We can confirm that our helicopter was dispatched to provide advanced critical care at an incident near Chalfont St Giles yesterday."
Born John Michael Osbourne on 3 December 1948, the singer grew up in Birmingham and rose to fame as the frontman and founding member of Black Sabbath, alongside Tony Iommi, Geezer Butler, and Bill Ward.
Forming in 1968, the band rose to prominence in the 1970s with hits such as 'Paranoid', 'War Pigs' and 'Changes', going on to become one of the most important and influential heavy metal bands of all time.
Osbourne would also enjoy a hugely successful career as a solo musician, with hits such as 'Crazy Train' and 'Mama, I'm Coming Home'.
He later became known throughout the 2000s as a reality star, starring in family show The Osbournes alongside his wife Sharon and two of their three children, Kelly and Jack.
Ozzy tied the knot with Sharon on 4 July 1982 and remained together for 43 years. The rocker was previously married to Thelma Riley between 1971 and 1982.
They had two children together, Jessica and Louis, and Ozzy also adopted Riley's son, Elliot, from a previous relationship.
LADbible Group has contacted Thames Valley and Osbourne's representatives for further comment.
Topics: Ozzy Osbourne, Sharon Osbourne, Music, Celebrity News
Brenna Cooper