A murderer will spend a minimum of 21 years behind bars after he battered a man to death in a violent street attack.

Graham Higgins, 28, knifed, kicked and stamped 58-year-old Albert McDonald to death during an incident in Riddrie, Glasgow, last June.

Mr McDonald was reportedly an associate of gangland figure Martin Hamilton, sometimes referred to as the Blackhill Butcher

The murder of Mr McDonald was the climax of a day of violence for Higgins, who had attacked three other men, including an attempted murder, on the day of the attack.

Higgins had denied the killing but a jury found him guilty following a trial at the High Court in Glasgow.

The jury heard how Mr McDonald was murdered shortly after leaving the Snug Bar near his home on Duke Street in the east end of Glasgow on June 15, 2015.

Mr McDonald left the pub at 9.04pm but less than 20 minutes later a 999 call was made after McDonald was discovered dying in nearby Cumbernauld Road.

He was taken to Glasgow Royal Infirmary for treatment but died as a result of his injuries.

His death was found to have been as a result of "blunt force injuries of the abdomen".

In the hours leading up to the murder, Higgins had carried out violent attacks upon two other men.

He attacked Richard Gachagan inTownhead and later turned on Joseph McLean in the nearby Royston area.

Then, after the murder, Higgins went on assault Paul McPhail with a pint glass at a pub in Baillieston.

Higgins was convicted of murder on Wednesday, the attempted murder of Joseph Mclean and assaulting Richard Gachagan.

He had earlier pleaded guilty to the assault of Paul McPhail.

Sentencing, Lord Armstrong said the attacks were all on "older men" and appeared "unprovoked".

Lord Armstrong ordered he serve a minimum 21 years behind bars.