North Korea's state media on Wednesday confirmed the arrest of a US citizen who was lecturing in Pyongyang -- the third American held in the country amid growing tensions with Washington.
Kim Sang-Duk, or Tony Kim, was arrested at the capital's airport on 
April 22, for "committing criminal acts of hostility aimed to overturn the DPRK", the Korean Central News Agency (KCNA) said, using the country's official name.