US said that Al Qaeda has approached the Iranian officials for release of the two sons of Osama bin Laden besides others kept in captivity in Iran. US secret agencies said that Al Qaeda held talks with the Iranian officials for the release of these leaders, but there was no such report that Iran was setting free the captive leaders of Al Qaeda. US officials said that Iran beginning talks with Al Qaeda was worrisome, as whatever might be the Iranian aims behind these talks, US was quite ignorant about it. It may be recalled that the two sons of Osama bin Laden were taken into Iranian custody in 2003.