U.S. Secretary of State Marco Rubio, Australian Foreign Minister Penny Wong, Japanese Foreign Minister Toshimitsu Motegi and Indian Foreign Minister Subrahmanyam Jaishankar attend a joint press conference after attending the Quad Foreign Ministers' meeting at the Hyderabad House in New Delhi on May 26. [REUTERS/YONHAP]

North Korea on Thursday denounced a recent joint statement by the top diplomats of the United States, Australia, Japan and India that called for the North's complete denuclearization, reiterating that it will never abandon its nuclear weapons.

The foreign ministers of the four nations, known as the U.S.-led multilateral security grouping of the Quad, reaffirmed their commitment to the "complete" denuclearization of North Korea in a joint statement issued Tuesday after their meeting in New Delhi.

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North Korea's foreign ministry said the Quad took issue with the North's legitimate exercise of sovereignty, claiming it is nothing but a political and diplomatic tool serving the realization of U.S. unipolar dominance.