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U.S: N. Korea reprocessing rods

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Riot police block a mock North Korean missile carried by South Korean protesters in Seoul where the two Koreas were holding talks Thursday.

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South Korea's intelligence agency says it believes North Korea has begun testing devices used to trigger nuclear explosions.
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WASHINGTON (CNN) -- North Korea has apparently begun reprocessing spent nuclear fuel rods, suggesting the communist country intends to produce nuclear weapons, a senior U.S. official has said.

Air samples taken in the vicinity of North Korea's Yongbyon nuclear plant indicate the presence of Krypton-85, a specific gas byproduct which suggests reprocessing of the materials is under way, intelligence experts said Saturday.

Sources said this month that American surveillance satellites identified a North Korean site about 25 miles (40 kilometers) northwest of the Yongbyon complex that "may or may not" be a testing facility for the development of a nuclear weapon small enough to be put atop a missile.

The testing appeared to involve conventional explosives designed to simulate triggers for such small nuclear weapons, the sources said.

North Korea could have about 8,000 spent nuclear fuel rods, experts say. Those rods, if successfully reprocessed, could contain enough plutonium to produce between six and 12 nuclear weapons -- some within a matter of months.

U.S. intelligence has concluded that North Korea has at least one and perhaps as many as three nuclear weapons.

This week South Korea's intelligence agency said it believed the North Koreans had reprocessed "a small portion" of its estimated supply of fuel rods at the Yongbyon nuclear facility.

The revelation came in a report from the head of the South Korean National Intelligence Service to lawmakers in the country's National Assembly.

The report also said North Korea had tested devices believed to be high explosives used to trigger a nuclear blast -- a key component in the construction of a working nuclear bomb.

The spent fuel rods were part of a plutonium-based nuclear weapons program frozen under a 1994 pact between North Korea and the United States.

The nuclear crisis blew up last year when Washington said Pyongyang admitted to a secret nuclear weapons program, in violation of the pact.

The United States accuses North Korea of continuing with a covert plan to enrich weapons-grade uranium for use in bombs.

-- Correspondents David Ensor, Chris Plante and Sohn Jie-Ae contributed to this report.


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