Officers were called to reports of a stabbing off Lido Road in Stoke Park, Guildford, around 6.10pm on Monday.They attended along with fire and ambulance crews, but the boy was pronounced dead at the scene.
Speaking on Tuesday afternoon, Detective Chief Superintendent Debbie White of Surrey Police asked witnesses to come forward “as a matter of urgency”.
She went on: “We appreciate that this incident will have caused shock and concern amongst our local communities, and we want to reassure you that we are working at pace to establish the circumstances of the boy’s death, gather as much evidence as possible and identify those responsible.Although the circumstances of the boy’s death are not clear at this time, this is a fast-moving investigation, and we are pursuing a number of lines of inquiry.
“We would ask that people don’t speculate about what might have happened while we work through these inquiries.
“A police cordon remains in place, and we respectfully ask that people stay away from the area while we carry out our investigation.
“A significant police presence will remain in the area for some time.”
