Police investigating the murder of a 33-year-old man in Edinburgh have confirmed they are following a positive line of inquiry.
Martin Hughes, of Wester Hailes Park, died after being stabbed at about 1500 BST on Monday.
Witnesses saw the victim leave a block of flats in the Wester Hailes Park area before collapsing on the road outside.
He was taken by ambulance to Edinburgh Royal Infirmary but later died of his injuries.
Lothian and Borders Police said the suspect was believed to live in the Wester Hailes area.
He is described as being about 30 years of age, 6ft tall and with fair or ginger hair.
He was last seen leaving the rear of the block of flats where the incident occurred before making off across a square and into the rear of another block of flats.
At the time he was wearing a dark tracksuit top with a zip, and light-coloured tracksuit bottoms.
Det Insp Matt Richards, who is leading the investigation, said: "At this time we are following a positive line of inquiry, and there is no wider danger to the public at large.
"However, we have stepped up uniformed patrols in the area in order to provide reassurance and support to local residents."