A North Korean delegation attended an Iranian expo in Tehran last week and discussed bilateral trade with Iranian government officials and the private sector, Iranian Foreign Ministry spokesperson Nasser Kanaani said on Monday.
North Korea and Iran have long been suspected of cooperating on ballistic missile programs, possibly exchanging technical expertise and components that went into their manufacture.
Kanaani denied such claims, saying that some media outlets had sought to make "biased speculations by publishing untrue and baseless news."
Tehran is hosting the sixth Export Potential Exhibition of the Islamic Republic of Iran from April 27 to May 1.