A man was assaulted by a group of men wielding a hammer in a dawn attack.

The 20-year-old victim was walking along Westcroft Road, in Carshalton, at 7am on Tuesday, September 20, when he was set upon by three men.

One hit him from behind with a heavy metal object, believed to be a hammer, before the two other men started kicking him while he was on the ground.

One of the attackers is described as white, aged late 20s-30s with short blond hairs. He was wearing a blue and white tracksuit and white trainers. The two other men were also white.

The victim was taken to hospital with a head injury.

A Sutton police spokesman described the incident as "a particularly nasty attack."

Anyone with information can call Sutton police or Crimestoppers on 0800 555 111.