Detective Sergeant Richard Quested said Canterbury Police were committed to preventing the harm illegal drugs caused in the community.
"Canterbury Police investigations are continuing and a number of people have been interviewed today. No arrests have been made at this time" Mr Quested said.
"Unfortunately people in our communities know firsthand the harm that is caused by psychoactive substances and this is a significant concern to police.
"The social harm impacts not only the user but their friends and families. Synthetic cannabis and other illicit substances cause unpredictable and violent behaviour.
"As with any drug there is also the deprivation linked to users spending money on these substances."
Anyone with any information about any crime or drug related activity in their community was urged to contact local police straight away, or call 111.
Alternatively they could call Crimestoppers on 0800 555 111.
Anyone who wanted any assistance with friends or family members struggling with drug addiction could contact the Canterbury Police Organised Crime Unit, or the Drug and Alcohol Help Line on 0800 787 797, or through their website www.adictionshelp.org.nz.