Imprisoned in North Korea: The Cases of 3 Americans<br />American said that Another captive, K<br />Mr. Kim had spent a month teaching accounting at Pyongyang University of Science<br />and Technology, in North Korea’s capital, and was trying to board a plane to leave the country when he was arrested on Saturday, according to the chancellor of the university, Chan-Mo Park.<br />In announcing his arrest, state news media said that Mr. Warmbier had visited North Korea with the intention of "bringing down the foundation of its single-minded unity." At a news conference last year, Mr. Warmbier acknowledged stealing the poster and said<br />that he had done so because an acquaintance had offered to give him a used car worth $10,000 in exchange for it.<br />The arrest on Saturday of Tony Kim, also known as Kim Sang-duk, brings to three the number of American citizens currently being held in North Korea.<br />Otto F. Warmbier, 21, a University of Virginia undergraduate from the Cincinnati area, had gone to North Korea on a group tour,<br />and was about to board a flight home when he was detained in January 2016.<br />"He had been involved with some other activities outside P.U.S.T., such as helping an orphanage." Mr. Kim, who is in his 50s, had previously taught at Yanbian University of Science<br />and Technology, an affiliated institute in the Chinese province of Jilin, near the North Korean border.<br />Kim Dong-chul, an American businessman, was sentenced to 10 years of hard labor in April 2016 for spying and other offenses.