A boy has been airlifted to hospital after being stabbed in the back.
The 16-year-old was stabbed in a cemetery in Market Deeping at around 5pm on July 19.
Five people have been arrested on suspicion of grievous bodily harm by Northamptonshire Police after the suspects left the scene.
The victim has been released from the Queen’s Medical Centre in Nottingham.
Anyone who has information should call police on 101, quoting incident number 369 of July 19.
Alternatively, contact the independent charity Crimestoppers anonymously on 0800 555 111.