As the nuclear talks resume yesterday in Vienna between Iran and P5 + 1, it is said that still there are unsolved issues in the talks. 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, Reuters reported. "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 on Monday with Iranian Foreign Minister Mohamed Javad Zarif - and were expected to meet again soon - to try to strike a deal 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." Separately, a senior Iranian official told reporters in Vienna on condition of anonymity that Tehran wanted a United Nations arms embargo terminated as well. A senior Western diplomat said a removal was "out of the question". The deal under discussion is aimed at curbing Tehran's most sensitive nuclear work for a decade or more, in exchange for relief from sanctions that have slashed Iran's oil exports and crippled its economy. The United States and its allies fear Iran is using its civilian nuclear program as a cover to develop a nuclear weapons capability. Iran says its program is peaceful. An agreement would be the most important milestone in decades towards easing hostility between the United States and Iran, enemies since Iranian revolutionaries captured 52 hostages in the U.S. embassy in Tehran in 1979.