Cannabis plants found through ‘hidden’ doorway behind bookshelf, police say

South Australian police say they have found dozens of cannabis plants growing in a “secret underground room” through a hidden doorway, behind a bookshelf, on a property north-east of Adelaide.

Police said the discovery was made as officers searched separate properties at Greenwith and Port Wakefield on Sunday, as part of an investigation into the “the activities of a group involved in the trafficking and cultivation of cannabis”.

They allegedly found a “hidden” doorway, which could only be opened electronically,…