'Gases consistent with North Korea's Feb test found'

April 23, 2013 12:19

VIENNA - Radioactive noble gases that could be attributed to North Korea's announced nuclear test in February have been detected, an international monitoring body said on Tuesday, providing the first such possible evidence of the explosion.

The finding was made at a monitoring station in Japan, about 1,000 km (620 miles) from the test site, the Comprehensive Test Ban Treaty Organization (CTBTO) said in a statement.

"Two radioactive isotopes of the noble gas xenon were identified, xenon-131m and xenon-133, which provide reliable information on the nuclear nature of the source," CTBTO said.

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