Peter Tobin, the man convicted of murdering three women in 2006, has been taken to hospital with a suspected heart attack.
The 65-year-old, who is serving three life sentences in Edinburgh's Saughton Prison, was rushed to hospital on Thursday afternoon.
Peter Tobin was convicted in 2006
The Scottish Prison Service would not reveal the identity of man, but confirmed that an inmate had been taken to hospital.
The serial killer was convicted of murdering Vicky Hamilton, 15, from Falkirk, Dinah McNicol, 18, from Essex and Angelika Kluk, 23, a Polish student studying in Glasgow.