VIENNA - Russia and China backed four Western powers on Wednesday to step up diplomatic pressure on Iran to allay concerns that it is developing atomic bombs capability, a day after Israel ramped up threats to attack the Islamic state.

The United States, France, Germany and Britain as well as Russia and China agreed a draft resolution at the UN nuclear agency to rebuke Iran over its expanded uranium enrichment program while making clear their desire to find a peaceful resolution to the dispute which risks a new Middle East war.

Russia and China, critical of unilateral Western sanctions on Iran's oil exports, were initially reluctant to submit a resolution on Iran to the 35-nation board of the International Atomic Energy Agency (IAEA), diplomats said.

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