An investigation has been launched after a Dundee man was found dead in Perth Prison.
Mark Allan, who was 47, was found dead last week.
The Scottish Fatalities Investigation Unit has launched an inquiry into his death, which is currently being treated as unexplained.
Allan had been serving a sentence of four years and six months after pleading guilty to a charge of assault to severe injury and permanent disfigurement on August 28 last year.
Allan, previously of Nursery Road, launched a vicious assault on Craig Cosgrove outside Khan’s takeaway on Brook Street, Broughty Ferry.
He brandished a knife before kicking Mr Cosgrove on the head and body several times and stabbing him, leaving him seriously injured.
Allan had been released on bail before being jailed earlier this month
Despite the death being treated as unexplained, a spokesman for Police Scotland confirmed there were no suspicious circumstances.
It is unclear at this stage where the body was discovered in HMP Perth.
Prison bosses reported the incident to Police Scotland on Thursday July 19.
Any death in custody may lead to a fatal accident inquiry.
However, that is a matter for the Lord Advocate or procurator fiscal to decide.
A spokeswoman for the Scottish Prison Service said: “I can confirm a death in custody has been reported in HMP Perth”
A spokesman for the Crown Office and Procurator Fiscal Service added: “I can confirm we’ve received a report in connection with the death of a 47-year-old man.
“The investigation into the death, under the direction of Scottish Fatalities Investigation Unit (SFIU), is ongoing .
“The family will be kept updated in relation to any significant developments.”
A police spokesman said: “Police Scotland attended at HMP Perth on Thursday July 19 in response to the reported death of a 47-year-old prisoner.
“The death is being treated as unexplained, but there are no apparent suspicious circumstances.”