Muhammad Ali dies aged 74

Muhammad Ali 1966

Muhammad Ali has died at the age of 74, a family spokesman has said.

BBC News reports that the former world heavyweight boxing champion, one of the world's best-known sportsmen, died at a hospital in the US city of Phoenix in Arizona state after being admitted on Thursday.

Yahoo Sports reports that Ali, who had a long battle with Parkinson's disease, was taken to a Phoenix area hospital earlier this week where he was being treated for a respiratory issue.

Once the most outrageous trash talker in sports, he was largely muted for the last quarter century of his life, quieted by a battle with Parkinson's Disease.

CBS News reported that several of Ali's daughters reportedly flew to Phoenix late Thursday and early Friday to be with their father

'It's extraordinarily grave', a source close to the family told Reuters then. 

Ali's daughter Laila, herself a former boxer, posted an old photo to Facebook on Friday of her father holding her daughter, Sydney.

'Thank for all the love and well wishes', Laila Ali wrote. 'I feel your love and appreciate it!!'

'After a 32-year battle with Parkinson's disease, Muhammad Ali has passed away at the age of 74. The three-time World Heavyweight Champion boxer died this evening', Bob Gunnell, a family spokesman, told NBC News.

Ali had suffered for three decades from Parkinson's, a progressive neurological condition that slowly robbed him of both his legendary verbal grace and his physical dexterity. A funeral service is planned in his hometown of Louisville, Kentucky.

Boxing legend Muhammad Ali dies aged 74

Muhammad Ali, simply 'The Greatest', dead at 74

Muhammad Ali, 'The Greatest of All Time', Dead at 74