'Happy slap' attack on youngster

It is thought the craze originated in south London

A 14-year-old has been attacked by three people who videoed the assault on a mobile phone.

The victim and his brother were walking along Dallington Road in Northampton last Wednesday evening when they were approached by three men.

One of the three pushed the boy into a bush before punching him in the side of the head.

The attack was videoed by another man on his mobile phone - a craze known as "happy slapping".

Detectives said the three then walked off towards a nearby pub.

One of the offenders has been described as white, between 15 and 20 years old, about 6ft 2in tall and was wearing a white and blue top.

He also appeared to be wearing eyeliner.