U.S. ambassador to the U.N., John Bolton, warned Moscow Thursday night that if Iran is allowed to develop nuclear weapons, Russia would be at risk from Tehran's nuclear-capable missile fleet.
"As the Iranians develop longer range, more accurate ballistic missiles, it's not just Israel or other American allies in the region or American-deployed forces that are at risk from an Iranian nuclear weapon," Bolton told ABC Radio host John Batchelor.
"Russia critically is at risk," he warned, adding: "Why anybody in Moscow thinks it's in their interest to have a nuclear-capable ballistic missile-equipped Iran near their southern border is a mystery to me."
Bolton's comments come as the U.S. tries to persuade the United Nations Security Council, which includes Russia, to pass sanctions against Iran, a move that Moscow opposes.
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Russia has helped build the Iranian nuclear program, beginning with the Bushehr Nuclear Power Plant.
Moscow has also sold surface-to-air missiles to Iran, in a bid to help Tehran repell airstrikes by Israel or the U.S. targeting its nuclear facilities.