Illegal sales of synthetic cannabis tipped police off to a larger drug operation running from a Christchurch flat this morning.
Plain clothes police officers involved in the search were also approached by a passer-by looking to buy drugs from the property.
A search warrant at the rental property near the central city netted $2000 worth of methamphetamine, bags of the synthetic cannabis and over $2000 cash.
The intersection of Hereford St and Stanmore Rd were cordoned off for an hour from 7am today while armed police cleared the address.
Detective Sergeant Richard Quested said gang members and a young child were among occupants found at the address.