AKIPRESS.COM - North Korea said it has resumed plutonium production by reprocessing spent fuel rods and that it has no plans to stop nuclear tests as long as perceived U.S. threats remain, Japan's Kyodo news agency reported on Wednesday.

In a written interview with Kyodo, the North's Atomic Energy Institute, which has jurisdiction over its main Yongbyon nuclear facilities, said: "We have reprocessed spent nuclear fuel rods removed from a graphite-moderated reactor," reports Reuters.

The institute also said North Korea had been producing highly enriched uranium necessary for nuclear arms and power "as scheduled", Kyodo added.

The institute did not mention the amount of plutonium or enriched uranium it had produced, Kyodo said.

The U.N. nuclear watchdog, the International Atomic Energy Agency (IAEA), said in June North Korea appeared to have reopened the Yongbyon plant to produce plutonium from spent fuel of a reactor central to its atomic weapons drive.

North Korea vowed in 2013 to restart all nuclear facilities, including the main reactor at its Yongbyon site that had been shut down.

North Korea had said in September that Yongbyon was operating and that it was working to improve the "quality and quantity" of its nuclear weapons.

North Korea conducted its fourth nuclear test in January.