The assault happened in Wherry Road at around 11pm on Sunday. A man was found by officers with a serious head injury and was taken to hospital. A spokeswoman for Norfolk Constabulary said the victim is in a stable condition and that enquiries to establish the events of that evening are ongoing. The force would like to speak to anyone who may have witnessed the attack. Anyone with any information is asked to contact Norfolk Constabulary, quoting reference 36/70223/25.