In the latest tragedy to hit the trapped New Zealand miners, the rescue robots have broken down.
The robots were sent into the mine early this morning, but soon encountered mechanical problems after running into water.
Police Superintendent Gary Knowles, who is in charge of the rescue operation, has confirmed that the robot had broken down and would no longer be used.
They entered the mine at 6am New Zealand time and by 8am had ceased functioning.
However, at 7am, drilling on site had reached within 10 metres of its 162 metre goal.
Operators then had to change the drill bit to reduce the risk of sparks in the potentially gaseous environment.
The bore holes will allow rescuers to insert listening devices and camera probes.