A teenager who was stabbed to death in the street has been named locally as Kieran Crump Raiswell.

A murder investigation is under way after the 18-year-old was targeted by a lone knifeman.

The teenager, who was not known to police and is understood to have been a completely innocent victim, was walking in Old Trafford, Greater Manchester, on Wednesday afternoon when he was attacked. A police spokesman said the motive for the attack in Upper Chorlton Road at about 2.20pm is not known.

The victim was given first aid by the side of the road when he was spotted by a Greater Manchester Fire and Rescue Service crew from Moss Side which was on its way back from a job. The crew pulled over and tried to save the teenager by giving him first aid and oxygen but his injuries proved too severe and he later died in hospital.

Rob Moore, president of Sale Sports Club, said on Twitter: "Devastated to hear of the untimely death of Kieran Crump Raiswell at just 18 years, a former Sale cricketer whom I coached for many years."

Chief superintendent Jim Liggett, divisional commander for Trafford, said: "Our thoughts and deepest sympathies are with the relatives and friends of this young man. I cannot begin to imagine what they are going through and specially trained officers are offering them whatever support we can.

"We are still very much in the early stages of this investigation and all we know for certain is that this young man has been attacked in broad daylight as he walked along the street.

"We are looking for one offender but the area would have been extremely busy so I would ask anyone who witnessed this to come forward. Undoubtedly, the answers to these questions may lie within the community and I would urge residents to stand side by side with us and help us bring this man's killer to justice."

He added: "If you know anything about the reasons why the victim was attacked, the circumstances leading up to it or the person responsible, you have an absolute responsibility to him, his family and to the justice process to do the right thing and let us know. We have a dedicated syndicate of experienced detectives investigating this matter and will do everything we can to bring whoever is responsible to justice."

A post-mortem examination will take place on later. Anyone with information is asked to call police on 0161 856 4711, or Crimestoppers anonymously on 0800 555 111.