Three teenagers have been arrested on suspicion of the murder of a 17-year-old boy who was stabbed to death in Cambridge on Saturday in what police have described as a "targeted attack".
Police were called to the scene of the stabbing near Logan's Meadow, Cambridge, a small nature reserve on the banks of the River Cam, at around 2:50pm on Saturday.
The 17-year-old victim was pronounced dead shortly after their arrival.
Officers arrested two 17-year-old boys at their South Cambridgeshire homes, and arrested a 14-year-old boy at his Cambridge home, all three were arrested on suspicion of murder.
All three suspects remain in police custody.
Detective Superintendent Carl Foster, from the Major Crime Unit, said: "While we are unable to confirm the cause of death until a post-mortem examination has been conducted, we believe the boy was stabbed in a targeted attack.
"We believe there were members of the public at the scene who spoke with paramedics but left before our officers arrived. I am directly appealing for these people to make contact with us please."