DUBAI (Reuters) -Iran's foreign ministry said on Monday it would have to see if there are changes in the U.S. position on sanctions, as the two countries negotiate a deal to resolve a decades-long dispute over Iran's nuclear ambitions. "I regret to inform you that the American side has not yet been willing to clarify this issue," ministry spokesperson Esmaeil Baghaei said in a weekly press conference in Tehran. "It must be clear to us how the oppressive sanctions against the Iranian people will be lifted, to ensure that past experiences are not repeated", he added.