Iran says the speaker of its parliament will visit North Korea to discuss "expansion of cooperation" with Pyongyang. The trip underlines the close ties between the two nations.
The U.S. has accused North Korea of providing Iran with advanced missiles capable of targeting European capitals.
The Iranian parliament's website says the speaker, Ali Larijani, will arrive in Pyongyang for a three-day visit beginning Sunday.
Iranian and North Korean officials have said in the past that the two countries are in "one trench" in the fight against "arrogant powers." Both are bitter enemies of the U.S. and the West.
The statement Wednesday said Larijani will visit China after winding up talks in Pyongyang.