A recording of the last contact with workers in the Pike River mine has been aired publicly for the first time.
The recording, in which a rumbling sound can be heard, followed by an operator asking if anyone was there, comes on the third anniversary of the tragedy in which 29 men were killed.
The tape, aired by Radio New Zealand today, was recorded at 3.44pm on November 19, 2010.
The mine had an intercom system which was linked to the control room.
Mine worker Dan Duggan was in the control room and used the intercom to speak with a worker, RNZ reported.