Waikato police are expanding a three-year operation targeting drug crime.
More than 350 people have been arrested in Hamilton during Operation Persil, which has clamped down on weapons and methamphetamine and cannabis-selling operations, as well as stolen goods.
The operation will now be expanded to include the whole district and officers have already executed warrants, searches and vehicle stops in Te Kuiti, Te Awamutu, Te Aroha, Huntly, Matamata and Morrinsville.
Waikato district commander Superintendent Win van der Velde said the operation was all about preventing and disrupting criminal activity and struck at the heart of offender behaviour.
"A lot of the warrants to arrest are for people breaching court-imposed sanctions such as bail. Our message to those people, their friends and family, is adhere to these conditions or you can expect police action, any time of the day.