Negotiations are underway Tuesday between Iran and six major world powers over the country's nuclear program.

This is the fourth round of high-level talks with Iranian officials, but there's little hope for a breakthrough. The first session began at a hotel in Almaty, Kazakhstan.

The world powers are expected to offer Iran limited relief from economic sanctions if it agrees to stop enriching uranium close to a weapons-grade level.

The Iranian economy has suffered serious inflation from those sanctions. Still, the Islamic Republic shows no signs of backing down over its nuclear program, insisting it has a sovereign right to enrich uranium.

Michael Mann, spokesman for European Union foreign policy chief Catherine Ashton, who's leading the talks, touched on world concerns regarding Iran's claims that their nuclear aspirations are strictly peaceful.

"The offer addresses the international concern on the exclusively peaceful nature of the Iranian nuclear program, but it is also responsive to Iranian ideas," Mann said.

He added that they hoped their proposals will "allow Iran to show some flexibility."

A member of the U.S. delegation said the latest offer to Iran included "substantive changes," The Gazette reported.