North Korea is not interested in an Iran-like dialogue with the United States to give up its nuclear capabilities.

North Korea is not interested in an Iran-like dialogue with the United States to give up its nuclear capabilities, the country's foreign ministry said in a statement on Tuesday.

The statement said North Korea's nuclear program was an "essential deterrence" against US foreign policy toward the country.

"It is not logical to compare our situation with the Iranian nuclear agreement because we are always subjected to provocative US military hostilities, including massive joint military exercises and a grave nuclear threat," said the statement, which was carried by state media but attributed to a foreign ministry spokesman.

"We do not have any interest at all on dialogue for unilaterally freezing or giving up our nukes," it said.

The United States and five world powers struck an historic deal with Iran last week.

The Iran agreement was a great political victory for US President Barack Obama, who has long promised to reach out to historic enemies, including North Korea.

North Korea is heavily sanctioned by the United States, European Union and the United Nations for procuring equipment related to its ongoing nuclear and ballistic missile programs.

"We are clearly a nuclear power and nuclear powers have their own interests," the North Korean statement said.