North Korea says it detained a 24-year-old American tourist earlier this month for "a gross violation of its legal order".
Miller Matthew Todd was detained on April 10, according to the North Korea news agency following "rash behaviour in the course of going through formalities for entry into the DPRK to tour it."
The news agency said Todd had a tourist visa for the DPRK, but tore it to pieces and shouted that he had come "to the DPRK after choosing it as a shelter."
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Ursula Keogh, 11, went missing on Monday around 3.30pm. She was dressed in her school uniform.
"My sincerest apologies to everyone who purchased tickets and were planning to come to the upcoming shows."
His comments at the Defence and Security Forum on Monday came after a £20 billion black hole in the budget for the next decade emerged.