In a written statement, Bay of Plenty District Commander, Superintendent Andy McGregor said, "police work tirelessly to keep our communities safe and acts of violence like this against our officers are unacceptable".
"Police takes the safety of its staff seriously and will continue to investigate this attack to hold those responsible to account.
"We are continuing to offer support to the officer and his family at this time."
Police Association President Chris Cahill expressed concern for the police officer who was assaulted.
"Our thoughts go out to the officer who was the victim of a horrific and cowardly attack while making an arrest at a property in Rotorua in the early hours of the morning," Mr Cahill said.
"The association is offering support to the injured officer and his family and assisting where we can.
"This is the second serious assault on a police officer this week, after a constable was bashed up to 15 times over the head in the main street of Morrinsville on Monday," Mr Cahill said.
"This incident highlights the dangerous situations that officers put themselves in while carrying out their duty. It very quickly turned a routine policing matter into a volatile and life-threatening situation.
"We all hope for a favourable outcome for the injured officer from this sickening assault," he said.
