German Minister of Foreign Affairs Guido Westerwelle(L) listens while US Secretary of State John Kerry speaks during a press conference at the US State Department May 31, 2013 in Washington
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US and Germany urge Russia not to arm Syria military

The US and Germany have called on Russia not to supply Syria's military with an advanced missile system they say could prolong the conflict there.

US Secretary of State John Kerry said the delivery of Russian weaponry could have a "profoundly negative impact" and put Israel's security at risk.

German Foreign Minister Guido Westerwelle urged Moscow not to hinder the chances of mooted peace talks.

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