North Korea's state media reported that Kim Yong-Nam, president of the North Korean parliament, met with a delegation from the Iranian Foreign Ministry that arrived in Pyongyang on January 18.
No other details were given.
North Korea announced it conducted its first nuclear test in 2006.
The United States and some European governments accuse Iran of seeking nuclear arms, a charge that officials in Tehran have consistently denied.
The UN Security Council voted unanimously in December to apply limited sanctions to Iran over its nuclear activities, which have prompted criticism from the UN nuclear watchdog, the International Atomic Energy Agency.
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