The US and China are committed to fighting protectionism, US Treasury Secretary Timothy Geithner has said following two days of high-level talks.

He said the two countries shared an interest in ensuring that trade remained "open and rules-based".

He was speaking after meeting Chinese Vice Premier Wang Qishan in Washington.

The US Secretary of State Hillary Clinton said that both countries had the common goal of ensuring Iran did not become a nuclear power.

"China shares our concerns about Iran becoming a nuclear weapons state. The potential for destabilising the Middle East and Gulf is viewed similarly by the Chinese," Mrs Clinton said.

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