A police dog handler and police dog were attacked during a domestic incident in Palmerston North that resulted in four arrests.
Police were called to domestic incident in Health Place, Awanui, and a dog unit was deployed to locate a man.
Police said while trying to arrest the man, the police officer was assaulted by a family member of the man and the police dog was injured.
The officer received minor head injuries and the dog was treated by a veterinarian and stood down from duty.
Police said the police dog was expected to resume duty later in the week.