World Powers gave Iran fresh details on a proposed deal concerning the Islamic Republic’s nuclear program.

World Powers gave Iran fresh details on a proposed deal concerning the Islamic Republic’s nuclear program.

At the talks on Monday, experts from the five permanent UN Security Council members -- Britain, China, France, Russia and the US -- plus Germany "had technical discussions with Iran," said a brief statement from a spokesman for EU foreign policy chief Catherine Ashton.

Monday's technical exchange will be followed by political talks in Almaty, Kazakhstan, on April 5 and 6, said Michael Mann, the spokesman for Ashton, who heads the talks between the six powers and Iran.

In Istanbul, the experts, led by Stephan Klement, "provided further details on the revised confidence building proposal" put forward by the western powers to Iran in talks in Almaty on February 26 and 27.

The offer, reportedly involving easing sanctions on Iran's gold and precious metals trade and lifting others on some very small banking operations, in return demands a tougher nuclear inspection regime and the interruption of enrichment operations at the Fordo bunker facility.

On Monday, US President Barack Obama urged Iran to take "immediate and meaningful steps" to move "toward an enduring, long-term settlement" with the world over its disputed nuclear program.