A teenage boy was assaulted as he walked through a park in Northampton.
The boy was walking through Thornton Park towards Mill Lane in Kingsthorpe sometime between 8.30pm and 9pm on Wednesday, September 23, when he was attacked by a stranger.
The man was white, between 5ft 8in and 5ft 10in and was wearing dark clothes and a balaclava.
Witnesses, or anyone who knows anything about this incident, can call Northamptonshire Police on 101.
Alternatively, they can call the independent charity Crimestoppers anonymously on 0800 555 111 or use the anonymous online form at www.crimestoppers-uk.org.