GREYMOUTH, New Zealand — Rescue officials are preparing to send a high-tech robot into a mine tunnel to transmit pictures and assess toxic gas levels three days after an explosion left 29 miners missing underground.
Police superintendent Gary Knowles, the rescue controller, said Monday that the New Zealand defense department had upgraded the robot so it would not create a spark and accidentally ignite a fresh explosion in the mine.
But they were still waiting for gas conditions to stabilize further before sending the robot in, Knowles said.
The dangerous gases and underground heat have kept rescue teams from entering the mine ever since the Friday afternoon blast, and there has been no communication with the 29 missing men.
- Photos: UCLA wades through damage caused by...
- Obama to GOP: 'Stop just hating all the time'
- Child sex trafficking bust reveals worries...
- Probe exposes flaws behind HealthCare.gov...
- GOP: Lois Lerner's IRS emails show bias...
- GOP-led House ready to OK lawsuit against Obama
- GOP-led House approves lawsuit against Obama
- Most Americans believe the U.S. should offer...
- Obama to GOP: 'Stop just hating all the... 45
- US Court: Virginia marriage is for all... 44
- Most Americans believe the U.S. should... 27
- GOP-led House ready to OK lawsuit... 24
- Obama maintains busy fundraising... 22
- GOP: Lois Lerner's IRS emails show bias... 22
- Fast food workers vow civil disobedience 18
- GOP-led House approves lawsuit against... 14