Mon 05 May 2007US and Iran hold 'positive' talksThe United States urged Iran today to stop supporting militias in Iraq in the most high-profile meeting between the two countries in almost 30 years that both sides later described as positive.The rare talks in Baghdad were narrowly focused on Iraq's spiralling sectarian violence and did not touch on Iran 's controversial nuclear programme, which has ratcheted up tensions between the two arch foes in recent months.