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A man watches a news channel airing a file image of Thae Yong Ho, minister at the North Korean Embassy in London, at Seoul Railway Station yesterday. Image Credit: AP

Seoul: North Korea’s deputy ambassador in London has defected with his family to South Korea, making him the highest-ranking Pyongyang diplomat ever to flee the isolated regime for the democratic South, South Korea said Wednesday.

The Unification Ministry in Seoul declined to say when or how Thae and his family arrived, or how many relatives accompanied him.

Thae defected due to discontent with the regime of Kim Jong-un in North Korea and for the future of his child, ministry spokesman Jeong Joon-hee told a news conference. It was not clear in Korean whether Jeong was referring to more than one child. “We know that Deputy Ambassador Thae is saying that his distaste for the Kim Jong Un regime and yearning for the Republic of Korea’s free democratic system and the future of his child are motives for the defection,” Jeong said, referring to South Korea, adding that Thae and his family were under government protection.

Impoverished North Korea and prosperous South Korea are technically still at war after their 1950-53 conflict ended in an armistice, not a peace treaty.

The announcement came a day after media report that a high-profile North Korean diplomat, later identified by the BBC as Thae, had defected.

Quoting an unnamed source, South Korea’s JoongAng Ilbo newspaper had said the diplomat embarked on a defection journey “following a scrupulous plan” and was in the process of “landing in a third country as an asylum seeker”.

An official at the North Korean embassy in London would not confirm the defection on Tuesday, describing reports of the event as “quite sudden”.

“If it is appropriate to give a response, then you might hear about our response,” the official told Reuters.

Further calls to the embassy went unanswered. Calls to Thae’s mobile phone were redirected to a voicemail inbox.

The UK’s Foreign and Commonwealth Office did not have an immediate comment after South Korea’s announcement.

Thae’s defection follows a string of recent such flights by North Koreans, including 12 waitresses at a North Korean restaurant in China who defected to South Korea earlier this year. Those waitresses have finished a prolonged period of investigation and have entered into normal society, an official at South Korea’s Unification Ministry said yesterday.

The number of defections by North Koreans to the South this year through July totalled 814, an annual increase of 15 per cent, a ministry official told Reuters. Several diplomats from North Korea have defected to the South over the last two years, including one from Thailand, South Korea’s Yonhap News Agency reported yesterday, citing a source familiar with North Korean affairs.

Overall, the number of defectors, mostly from the area near North Korea’s border with China, has declined since leader Kim Jong Un, a third-generation dictator, took power following his father’s death in late 2011.

“The bigger picture is that while there have been fewer total defections per year under Kim Jong Un, there have been a higher number of strategically significant and political defections,” said Sokeel Park of LiNK, an NGO which works with North Korean defectors.North Korea has become increasingly isolated after conducting its fourth nuclear test in January and numerous ballistic missile launches this year, which resulted in tightened UN Security Council sanctions.

Among his many responsibilities, Thae was well-known to the British press, acting as the embassy’s main point of contact for British correspondents travelling to Pyongyang.