A routine police procedure took a nasty turn on Tuesday night ending in a serious attack on an officer and a man on the run from the Ruakākā Police Station.
An investigation has been launched into the assault that occurred shortly after 11pm on March 16.
Northland district commander Superintendent Tony Hill said police often deal with very dangerous and unpredictable situations in their everyday work to keep the community safe.
"Violence towards police staff is completely unacceptable, and we are taking this matter extremely seriously."