The 39-year-old criminal has been fighting serious illness for over three weeks at this stage, but his condition is said to have deteriorated in recent days.
His very illness is not connected to any act of violence participated on him.
“The next few hours are absolutely crucial,” a source told
In March, Price, who is part of the Maguire faction in the deadly Drogheda feud, was released on bail in the UK where he is awaiting trial for his part in a kidnapping plot.
He had been living in the Midlands in England but moved to Wales over the summer.
The trial is expected to last between eight to nine weeks and is due to start on December 6, the day of Price’s 40th birthday.
Price is one of six people who have been charged in England over a plot to kidnap two men.
The gangster is charged with two counts of conspiring to falsely imprison Muhammed and Shah Ali last July, as well as two counts of conspiring to blackmail both men on the same dates.
One of Ireland’s most notorious criminals, Price has to wear an electronic tag as part of his bail conditions.
His gang are suspected of abducting and murdering Willie Maughan (34) and his pregnant Latvian girlfriend, Ana Varslavane, (21) on April 14, 2015, near Price’s compound in Gormanston, Co Meath.
Last month close female associate of gang boss was arrested by detectives as part of this double murder probe.
She was the fifth person and the third woman to be arrested for withholding information in the case and all have close links to Price.
The tragic pair were planning on moving back to his family home in Tallaght on the day they went missing and are understood to have been brutally murdered because they had key information about the gang’s activities including another murder.
No trace of their bodies has ever been found but they are believed to have been burnt after their gruesome murder.
In April, 2017, gardai failed to find any evidence of the tragic slain couple when they carried out a detailed dig near Monasterboice, Co Louth.
Days before this dig, they raided Price’s compound as part of the double murder probe.
It previously emerged that gang boss Price taunted and laughed at gardai as they searched for the missing couple near his compound in Co Meath in the summer of 2015.
Price left Ireland after the grisly murder of Keane Mulready-Woods (17) in January of last year which happened as part of the Drogheda feud and has claimed the lives of four males.
Price’s mob are also the chief suspects for the murder of the unsolved murder of Benny Whitehouse and Price was previously arrested for this crime.
Mr Whitehouse was shot dead at Clonard Street, Balbriggan, on September 25, 2014 in front of his partner as part of a separate feud.
The same gang is being investigated for a pipe-bomb attack at the home of Willie Maughan's sister in Rathfarnham in October, 2015.