A police officer is in Waikato Hospital with serious head injuries after being assaulted while on duty in Rotorua.
At midnight on Thursday he and another officer responded to an emergency call from a residential property in Owhata.
The constable was in the process of arresting a male for an alleged assault of a female, when a second offender jumped a fence and struck him on the side of the head with an unknown object.
He was knocked unconscious and the offender took off on foot.
The officer was taken to Rotorua Hospital, then transferred to Waikato where he is currently sedated and in a stable condition.