The short announcement by the North's state media contained few details and it wasn't clear if the woman had been detained in the North and if her deportation had taken place or would soon.
The American was identified as Suh Sandra, likely following Korean style of using the surname first. It did not give her hometown.
The statement alleged that the woman traveled to North Korea several times "under the pretense of 'humanitarianism,'" but she had secretly produced and directed anti-North Korean videos and photos because of her "inveterate repugnancy" toward Pyongyang.
North Korea has occasionally detained Americans and other foreigners for what the cloistered country considered missionary work or "anti-state" activities that it sees as attempts to bring down its authoritarian government.
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However, today's report appeared to be the first word about Suh Sandra.
Pyongyang said it decided to deport the American because of her "old age" and after she apologized and admitted that she'd "seriously insulted" its citizens' trust in leader Kim Jong Un.