Not something the neighbors would approve of…
No casualties reported (yet) by the Chinese, while the North Korean’s simply don’t report on such “industrial accidents.”
NUCLEAR, BIOLOGICAL AND CHEMICAL WEAPONS
North Korean Nerve Gas Enters China
October 19, 2009: Anonymous Chinese military sources revealed that, a year ago, nerve gas detectors on the North Korean border went off. Further investigation revealed small amounts of Sarin nerve gas. There were no casualties, but the detectors went off again three months later. The Chinese don’t have nerve gas detectors deployed on the North Korean border, but they do periodically send special operations troops to the border to check security, and these units carry the detectors with them.
When one considers the close relations between North Korea, Syria, and Iran, the implications are grim.