Three teenagers were attacked in Kettering on Friday night.
Police are appealing for witnesses to the assault which took place in Green Lane/Mill Road, Kettering, sometime between 9.30pm and 9.45pm.
A group of three 14-year-olds were walking along Mill Road, when they were approached by two men, who for reasons yet unknown, assaulted the three 14-year-olds.
The offenders then made off from the scene.
Both offenders were white, in their mid-20s, about 6ft 1in, had local accents and were of thin build.
One wore a white/grey baseball cap, a white/grey hooded top, grey jogging bottoms and white trainers.
The second had dark brown, straight hair, had stubble and wore a black top, black tracksuit bottoms and white trainers.
Officers would like to speak to anyone witnessed the incident.
Witnesses to this incident, or anyone with information about it, can call Northamptonshire Police on 101 or information can be given anonymously to Crimestoppers on 0800 555111.