Police are asking witnesses to come forward following a serious assault in south-east of Auckland early this morning.

They say a man was set upon by a group of people just before 2am on Riverview Rd in Panmure.

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He was admitted to hospital and treated for serious injuries but his condition has since improved and it is likely he'll be discharged today.

Anyone who has any information about what happened should contact police or Crimestoppers on 0800 555 111.