Police are appealing for witnesses after a woman was attacked with a hammer in a Croydon supermarket.

The 37-year-old victim was shopping in Sainsbury's in the Whitgift Centre at about 3pm on May 25, when she was hit on the back of the head with a hammer.

London Ambulance were called and the woman was take to a south London hospital.

A 25-year-old woman was arrested at the scene and has since been detained under section two of the Mental Health Act.

Anyone with information is asked to call Croydon CID on 0203 276 2172 or Crimestoppers anonymously on 0800 555 111.