Finbar Sullivan, 21, has been named as the victim of a fatal stabbing in Primrose Hill, north-west London. He was attacked in the early evening on Tuesday and pronounced dead at the scene.
A 27-year-old man has been arrested on suspicion of murder, while a 25-year-old man has been arrested on suspicion of assisting an offender. Both remain in police custody.
Another man, believed to be in his 20s, was found nearby on Regent's Park Road with stab wounds and taken to hospital; his injuries are not life-threatening.
Detective Inspector Andy Griffin said: 'My thoughts remain with Finbar's family who continue to receive support from specialist officers at this unimaginably difficult time.'
Finbar's father, Christopher Sullivan, a musician and founder of the 1980s band Blue Rondo à la Turk, said his son had gone to the park to use a new camera he had been given for his 21st birthday. He described the tragedy as 'the worst I could ever imagine'.
Police have thanked members of the public who came forward with information and encouraged others to do so, adding that an increased police presence will remain in the area.
