A 14-year-old boy has been arrested on suspicion of murder and remains in custody, while a 16-year-old boy previously arrested has been released without charge.
Alfie's family described him as "one in a million" with a big heart who took care of everyone around him. Tributes have been left at the scene, and a bench near the incident site has been adorned with flowers and tealights spelling out his name.
Police have asked the public not to speculate about the case and to let the investigation determine the circumstances of Alfie's tragic death.
The local community and school have been deeply affected by Alfie's death, with a special service held at a nearby church and a vigil organized by young people to remember their friend.
Prime Minister Rishi Sunak expressed his condolences, saying, "My heart goes out to [Alfie's] family and friends. They've lost a friend, and this is awful."