A neighbour of a Christchurch property that was raided in a drugs bust today said he had "no idea" cannabis was being grown next door.
The police confirmed they had raided five houses so far to uncover cannabis operations as part of a large-scale probe in Christchurch.
The campaign against organised crime included search warrants on at least one house on Kellys Road in Mairehau, at about 11.30am.
Detective Senior Sergeant Joel Syme said large amounts of cash and other assets had been seized, and several big cannabis cultivations had been found.