Suspected North Korea missile parts seized en route to Syria in May

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* Seized cylinders may be usable in missile work

* China, South Korea investigating the seizure (Adds details, background)

By Louis Charbonneau

UNITED NATIONS, Nov 13 (Reuters) - A shipment of graphite cylinders usable in a missile program and suspected to have come from North Korea were found in May aboard a Chinese ship en route to Syria in what appears to have been a violation of U.N. sanctions, diplomats said on Tuesday.

South Korean officials seized the shipment of 445 graphite cylinders, which had been declared as lead piping, from a Chinese vessel called the Xin Yan Tai, U.N. Security Council diplomats told Reuters on condition of anonymity.

South Korean authorities stopped the ship at the South Korean port of Busan, the envoys said, adding that the cylinders were intended for a Syrian company called Electric Parts.

South Korean officials informed the Security Council's North Korea sanctions committee about the seizure on Oct. 24, the envoys said, adding that China had offered to help investigate the circumstances surrounding the incident.

"It appears the cylinders were intended for Syria's missile program," a diplomat said. "China assured us they will investigate what looks like a violation of U.N.

"sanctions, diplomats said on Tuesday.South Korean officials seized the shipment of 445 graphite cylinders, which had been declared as lead piping, from a Chinese vessel called the Xin Yan Tai, U.N"sanctions."

Diplomats said the graphite cylinders appeared to be c onsistent with material usable in a ballistic missile program a nd that S outh Korea would be jointly investigating the case with China.

The shipment to Syria was arranged by a North Korean trading company, diplomats said. One diplomat said the Syrian company that was to have received the cylinders may be a subsidiary of the North Korean Korean trading firm.

North Korea is barred from importing or exporting nuclear and missile technology under U.N. Security Council sanctions imposed on Pyongyang because of its nuclear tests in 2006 and 2009.

There are U.S. and European Union sanctions on Syria, but no U.N. arms embargo against the government of Syrian President Bashar al-Assad, who has led a 20-month military campaign against an increasingly militarized opposition.

Russia and Iran have been Assad's main arms suppliers.

Earlier this year , the Security Council's Panel of Experts on North Korea, a group of independent experts that monitors compliance with the U.N.

sanctions regime, said it was investigating reports of possible weapons-related deals between Pyongyang and Syria as we ll as Mya nmar.

"The DPRK (North Korea) continues actively to defy the measures in the (U.N. sanctions) resolutions," the panel said in May. (Reporting By Louis Charbonneau; editing by Christopher Wilson)

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