Serial killer Peter Tobin was taken to hospital yesterday after suffering chest pains.
Tobin, 65, serving three life sentences for the murders of Vicky Hamilton, Angelika Kluk and Dinah McNicol, became ill at Edinburgh's Saughton Prison yesterday afternoon.
The killer, who had a history of missing court through illness, was reportedly taken to the city's Royal Infirmary by an ambulance under police escort.
He suffered chest pains yesterday afternoon and collapsed, unable to breathe, the Daily Record said.
It is understood he has now returned to the prison.
Tobin is certain to spend the rest of his life behind bars.
The serial killer is serving a life sentence for raping and murdering Polish student Angelika, 23, and hiding her body under the floor of a Glasgow church in 2006.
He has also been convicted of murdering 15-year-old schoolgirl Vicky, of Redding, near Falkirk, in 1991, and 18-year-old Dinah in the same year.
Their bodies were found 17 years later, buried in the garden of his former home in Margate, Kent.
Police have also examined hundreds of other unsolved murder cases to see if they could be linked to the killer. Their operation, codenamed Anagram, was launched in 2006 and wound down last year.
Detectives also looked at possible links between the killer and the Bible John murders in Glasgow between 1968 and 1969. Three women, Patricia Docker, 25, Jemima McDonald, 32 and Helen Puttock, 29, were all murdered.
However, although it is thought Tobin lived in the city at the time, any link between him and Bible John has never been established by police.