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According to a State Department spokesperson, the perceived risk of further detentions of American citizens (i.e., beyond that of student Otto Warmbier who died as the result of a catastrophic head injury sustained while imprisoned in North Korea) has resulted in imposition of "a geographical travel restriction on all U.S. citizen nationals' use of a passport to travel in, through, or to North Korea."

At least 16 Americans have been arrested and detained in North Korea in the past 10 years.