A man has been held after the boy, believed to be 16, was stabbed to death in Primrose Hill, London.
A man has been arrested on suspicion of murder after a boy was stabbed to death in north London on New Year’s Eve.
Police were called to the stabbing in Primrose Hill, Camden, at about 23:40 GMT on Sunday.
Officers gave first aid to the victim, who was believed to be a 16-year-old boy, but he was pronounced dead shortly before midnight.
A cordon has been set up at the park as detectives carry out forensic examinations at the scene.
The Metropolitan Police said the area was busy with people watching fireworks at the time of the stabbing and appealed for witnesses to contact them.
The park is not an official viewing area for London’s New Year fireworks, but people gather there to watch them.
On Monday morning, police officers stood guard at every entrance to the park, directing dog walkers and joggers away from the area and telling them it would be closed all day.
Police tape has been used to section off the area, and a forensic tent has been erected at the northern end of Primrose Hill.
A man has been arrested on suspicion of murder and taken into custody, police said.
The boy’s family have been informed, and will be supported by specialist officers.