Iranian official on deal: It only depends on political will

By Nic Robertson and Elise Labott, CNN, Updated 10:54 AM ET, Mon July 13, 2015, Source

Negotiators are meeting Monday in a Vienna conference continuing negotiations, for which, Western diplomats say the major hurdles to a deal have been overcome. Those diplomats also acknowledge some important issues needed to be resolved and capitals still needed to sign off. Those loose ends are what are keeping Iranian officials from sounding more optimistic, with a Monday deadline looming.

"There are two or three things that need to be worked out," a senior Iranian official told CNN on Sunday.

But if all goes well, an announcement could come as early as Monday, Western officials said.

"We are nearly there," one Western diplomat said.

Another said negotiators made good progress over the weekend and the talks were reaching the "endgame."

The Iranian official said whether or not a deal gets struck hinges on the negotiators' appetite for getting it done.

"It only depends on political will," the official told CNN.

Secretary of State John Kerry on Sunday said he is "hopeful" about the U.S. and the other world powers being able to reach a deal with Iran to curb its nuclear program.

The negotiators, facing another deadline, on Friday extended the talks through Monday. This was the third extension of the final round. The parties also extended the interim agreement, known as the Joint Plan of Action, through Monday.

On Saturday, after one of his meetings with the European negotiator and the Iranian Foreign Minister, Kerry tweeted "Still have difficult issues to resolve."

Several of the European foreign ministers had left Vienna late last week, but have since returned.

French Foreign Minister Laurent Fabius, who just arrived back to the Iranian nuclear negotiations in Vienna, said he was optimistic the talks were nearing completion.

"I hope we are finally entering the final phase of these marathon negotiations," he told reporters, outside the Palais Coburg. "I believe it."

In another signal that talks are entering a critical stage, Russia's Foreign Minister Sergey Lavrov is back in Vienna to join negotiations.

But a senior State Department official cautioned against too much optimism at this stage.

"We have never speculated about the timing of anything during these negotiations, and we're certainly not going to start now - especially given the fact that major issues remain to be resolved in these talks," the official told CNN.

And a top Iranian official called reaching a deal on Sunday "logistically impossible."

"We are working hard, but a deal tonight is simply logistically impossible. This is a 100 page document, after all", Iranian Foreign Ministry official Alireza Miryousefi tweeted, citing a senior Iranian official.

CNN's Alex Felton contributed to this report