Australia's Daily Telegraph reports that betting syndicates have also been ruled out as perpetrators of the bugging, but it's likely to take weeks before police wrap up their investigation.
After the incident, rumours emerged that the All Blacks planted the device themselves in a prank gone wrong.
However that theory has been debunked, with police confirming the listening device found at the Intercontinental Hotel in Double Bay was live.
Police said they found no evidence that an All Black was involved in the planting of the device.
