China's foreign ministry has confirmed the arrest of a US scholar, accusing him of spying and endangering Chinese national security. U Min Zin, a director at a think tank focused on Myanmar, was arrested in early June, sources had earlier told the New York Times. He allegedly disappeared while in the Chinese city of Kunming, which borders Myanmar, said the report. Further details about the arrest - which is unusual, as it is uncommon for China to arrest US citizens on national security charges -