Bush administration urged to be cautious on Iran accusations

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Mitch Mcconnell, US senator, republican, said, "If we're going to protect our forces in Iraq and if there are Iranians in Iraq, inside Iraq, seeking to do harm to our soldiers, of course we will take the appropriate action."

US military experts say the supply trail began with Iran's Revolutionary Guards, which is also accused of supplying arms to the Hezbollah guerrilla army in Lebanon.

Editor:Du Xiaodan