An investigation is under way after the sudden death of a prisoner at HMP Perth.
Reese Fairgrieve, 23, was found dead in his jail cell on Sunday morning.
Enquiries into the full circumstances of the Fife man's passing are ongoing.
Heartbroken friends have paid tribute to Mr Fairgrieve on social media. A fundraising campaign has also been set up to give him the "send off he deserves".
A Police Scotland spokesman said: "Police were informed of the death of a prisoner at HM Prison Perth around 12pm on Sunday.
"There are no suspicious circumstances surrounding the death and a report will be submitted to the Procurator Fiscal."
Genna Botes set up a page on gofundme.com to raise £3,000 towards his funeral costs.
"It has come as a huge shock to everyone hearing the devastating news of Reese's passing," she wrote.
"Words can't describe how gutted we all are. It's come as a huge shock to the family."
She added: "This is not me asking me asking for charity, this is me asking to help take the strain off the family and allow them to grieve without having to worry about money."
Genna said she set up the page to "help raise funds to give Reese the best send-off he deserves.
"He will be sadly missed by so many, that cheeky wee smile, his nutty nature and his constant banter."
Mr Fairgrieve was previously jailed over an incident at a McDonald's restaurant in his home town of Glenrothes.
Dunfermline Sheriff Court heard how he threatened staff and threw food around in the early hours of August 25, 2018.
He became aggressive and struggled with staff, the court was told. Reese fell to the floor and was restrained until police came.
During the struggle, a lock-knife fell out of his pocket.
The court heard the incident happened shortly after Mr Fairgrieve was released early from prison. He was sent back to jail to serve the remainder of this previous sentence – 180 days – and a further 208 days.
Mr Fairgrieve was also convicted at Inverness Sheriff Court in May 2019 after being found in possession of a knife, a knuckle duster and cocaine.
He was ordered to perform 300 hours of unpaid work.