Detectives investigating the murder of a "caring and quiet" teenager have arrested a 26-year-old man on suspicion of his murder.
Kieran Crump Raiswell, 18, died from stab wounds to his chest after he was attacked in broad daylight in Whalley Range, Greater Manchester, on Wednesday afternoon.
A 26-year-old man from Bracknell, Berkshire, has been arrested on suspicion of murder and remains in police custody for questioning, a spokesman for Greater Manchester Police said.
Detective Chief Inspector Peter Marsh, from Greater Manchester Police's Major Incident Team, said: "We have made an arrest but the investigation is continuing. I still want to hear from you if you saw Kieran walking along Upper Chorlton Road on Wednesday afternoon or if you saw anyone acting suspiciously."
A post-mortem examination concluded Kieran died from a stab wound to the chest.
The teenager had left his home and may have been intending to hand out his CV to shops and businesses in Manchester city centre as he had done the day before he was murdered, police said.
The youngster "had his whole life ahead of him", his family said, and was due to start university in September after finishing his gap year. Police have discounted robbery as a motive and said they simply have "no idea" why he was targeted in an apparently random attack.
Police have released CCTV footage of the victim walking along Upper Chorlton Road taken just minutes before he was murdered. The images were taken at a local Tesco just a few hundred yards further down the busy main road and they show Mr Crump Raiswell listening to music on his headphones, carrying his CVs in his rucksack and apparently "oblivious" to what was to unfold.
Within seconds, his killer emerged from bushes on a side street to the main road and attacked him from behind with a knife before running off. Mr Crump Raiswell was given emergency first aid by the side of the road by a passing fire brigade crew but his injuries proved too severe and he later died in hospital.
Anyone with information is asked to call police on 0161 856 4711 or contact the independent charity Crimestoppers, anonymously, on 0800 555 111.