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North Korea received $25 million for Iran tunnel technology, former diplomat says

Jun 25, 2026, 10:35 GMT+1

Aformer North Korean diplomat said Pyongyang received about $25 million for providing Iran with tunnel technology that he understood was used extensively at underground nuclear facilities near Natanz and Isfahan.

Ryu Hyun-woo, a former acting ambassador at North Korea’s embassy in Kuwait, made the remarks in an interview published this month by the Korea Development Institute, a prominent South Korean think tank.

“North Korea provided Iran with tunnel design and technology in the early 2000s, receiving about $25 million,” Ryu said.

“I understand that North Korean tunnel technology was applied to a considerable extent at underground nuclear facilities in areas such as Natanz and Isfahan,” he added.

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