Several kilograms of synthetic cannabis known as Venom have been seized during searches of two premises in southern suburbs of Perth in Western Australia (WA), police said on Friday. WA Police carried out the raids on Thursday and confiscated the cannabis found at the two homes. No one had been charged over the seizures, but the investigation is continuing, police said. Police have warned that all synthetic cannabinoid substances are illegal to sell or possess in Western Australia. \"Substances marketed as \'legal highs\' may contain synthetic cannabinoids and/or other prohibited substances,\" said WA police in a statement. \"Anyone in possession of Venom is advised to avoid taking the drugs and to destroy them immediately,\" it added.