AP: Agreement Reached on Outline for Iran Nuclear Deal

LAUSANNE, Switzerland (AP) -- Iran and six world powers have agreed on the outlines of an understanding to limit Iran's nuclear programs, officials told The Associated Press Thursday. Negotiations continued on a dispute over how much of it to make public.

The officials spoke outside weeklong talks that have been twice extended past the March 31 deadline in an effort to formulate both a general statement of what has been accomplished and documents describing what needs to be done to meet a June 30 deadline for a final accord.

Representatives of world powers meet to pin down a nuclear deal with Iran, Monday, March 30, 2015, in Lausanne, Switzerland. (AP/Brendan Smialowski, Pool)

A news conference was set for later in the day, when the results of the talks were expected to be announced.

European Union foreign policy chief Federica Mogherini and Iranian Foreign Minister Mohammad Javad Zarif were to read out the same statement in English and Farsi. Zarif and U.S. Secretary of State John Kerry were then expected to brief reporters separately.

The U.S. and five other countries hope to curb Iran's nuclear technologies that could be used to make weapons. Tehran denies such ambitions but is negotiating because it wants a lifting of economic sanctions imposed over its nuclear program.

Pressured by congressional critics in the U.S. who threaten to impose new sanctions over what they say is a bad emerging deal, the Obama administration is demanding significant public disclosure of agreements and understandings reached at the current round. Iran wants a minimum made public at this point, describing previous two-stage deals as detrimental to their interests, officials say.

The Iranians want any results from talks in the Swiss city of Lausanne described less as a deal and more of an informal understanding.

The officials demanded anonymity because they are not authorized to discuss the negotiations publicly.

They spoke after senior diplomats from the six countries negotiating with Iran huddled overnight in strategy sessions meant to advance the pace of agonizingly slow nuclear talks. Iran's foreign minister said the sides were close to a preliminary agreement, but not yet there.

The talks resumed several hours after a flurry of overnight sessions between Kerry and Zarif, and other meetings involving the six powers.

Iran also wants to get rid of sanctions that have stifled its economy. The U.S. and its partners want detailed documents on the steps Iran must take by the end of June on its nuclear program.

As he headed to his own meeting Thursday, Zarif said the talks had made "significant progress." But he said drafts still had to be written.

One problem, said Zarif, was differing voices among the other side at the table - the United States, Russia, China, Britain, France and Germany - making it difficult for them "to reach a coordination."

Russian Foreign Minister Sergey Lavrov, who left Lausanne Tuesday, said the two sides were close, the Interfax news agency reported. There are "only a few steps left to take or, in some cases, even-half steps, and some things have already been agreed upon," he said.

But as the talks dragged on, one Western official said early Thursday that they were "at a tough moment and the path forward is really unclear," adding that the idea of breaking talks off over Passover and Easter and resuming them next week had been informally raised. That was confirmed by another official. Neither was authorized to discuss the negotiations publicly, and both demanded anonymity to speak.

The talks - the latest in more than a decade of diplomatic efforts to curb Iran's nuclear prowess - hit the weeklong mark on Thursday, shortly before the State Department announced they would go into double overtime from the March 31 deadline for a political framework.

As the sides bore down on efforts to get a deal, German Foreign Minister Frank-Walter Steinmeier canceled a planned visit to Lithuania, Estonia and Latvia. French Foreign Minister Laurent Fabius was also back, less than a day after leaving the city.

By blowing through self-imposed deadlines, President Barack Obama risks further antagonizing lawmakers in both parties who are poised to take their own action to upend a deal if they determine the administration has been too conciliatory.

The initial response to the extensions from Republicans suggested they already reached that conclusion. "It is clear, the negotiations are not going well," Sens. John McCain of Arizona and Lindsey Graham of South Carolina said in a statement. "At every step, the Iranians appear intent on retaining the capacity to achieve a nuclear weapon."