SYDNEY, AUSTRALIA - AUGUST 19: All Blacks players train during the New Zealand All Blacks Captain's Run at North Sydney Oval on August 19, 2016 in Sydney, Australia. (Photo by Brett Hemmings/Getty Images)

The All Blacks have been rocked by a bugging bombshell ahead of Saturday’s first Bledisloe Cup Test against the Wallabies.

According to a New Zealand Herald report, a listening device was found in the All Blacks team room at their hotel in Sydney.

The Herald reported that the device was planted in a chair, with the hotel now investigating how it got there. The device was discovered on Monday by team security and was believed to be live.

New Zealand Rugby Union confirmed the incident to the Herald.

New South Wales Police are due to address the media later Saturday, saying in a statement the press conference would relate to “a listening device ... located in a room at a hotel in Double Bay on Monday 15 August”.