Inside the prison where the terrorist Tarrant killed 50 people in the mosque.

The cell where the terrorist accused of attacks on New Zealand's Christchurch is being kept, is described as a gray space and 17kg block walls.

Brenton Tarrant, 28, is being watched 24 hours by high-security prison cameras in Auckland, also refusing access to newspapers, television and radio, reports New Zealand Herald, broadcasting Express.

Australian's surrounded in his cell with heart rate detectors, security doors that open with fingerprints and a super armoured door.

Photos published by the newspaper of Zealand show images of what appears inside the terrorist cell.