VIENNA - A dispute over U.N. sanctions on Iran's ballistic missile program and a broader arms embargo were among issues holding up a nuclear deal between Tehran and six world powers on Monday, the day before their latest self-imposed deadline.

"The Iranians want the ballistic missile sanctions lifted. They say there is no reason to connect it with the nuclear issue, a view that is difficult to accept," one Western official told Reuters. "There's no appetite for that on our part."

Iranian and other Western officials confirmed this view. The foreign ministers of the six powers - Britain, China, France, Germany, Russia and the United States - met with Iranian Foreign Minister Javad Mohamed Zarif on Monday to try to strike a deal with Iran by Tuesday night.

"The Western side insists that not only should it (Iran's ballistic missile program) remain under sanctions, but that Iran should suspend its program as well," an Iranian official said.

"But Iran is insisting on its rights and says all the sanctions, including on the ballistic missiles, should be lifted when the U.N. sanctions are lifted." (Reuters)