A teenager has been sentenced to five years and four months’ detention after stabbing a 17-year-old boy at a house party in Chesham in an “unprovoked” attack.

An 18-year-old man from Chesham, who was 17 at the time of the offence, cannot be named for legal reasons.

The victim, who was stabbed on July 16 last year, suffered injuries to his chest and required hospital treatment following the attack at around 1.05am.

The 18-year-old was charged on April 20 this year with wounding with intent to do grievous bodily harm and possession of an offensive weapon, and pleaded guilty on June 26.

Investigating officer Detective Constable Richard Bazeley, of Aylesbury Force CID, said: “Knife crime is not tolerated in the Thames Valley and officers will thoroughly investigate and prosecute those found to be offending.

“The victim in this case was seriously hurt and it was fortunate he survived his injuries.

“Anyone carrying or using a knife is gambling with their life and other people’s lives.

“I would like to take this opportunity to thank the victim and witnesses who provided information and evidence in this case.

“If anyone has information regarding people carrying knives, I would urge you to report it. You could save a life.”

Call 101 or Crimestoppers on 0800 555 111.