Iran's Supreme Leader Ayatollah Ali Khamenei called the deal reached in Geneva "the basis" for further progress.
Iranian leaders have welcomed the six-month, "first-step" nuclear agreement reached with world powers, saying it recognizes Iran's "rights" to maintain an atomic program.
Iranian Supreme Leader Ayatollah Ali Khamenei said on November 24 that the deal reached in Geneva was "the basis" for further progress.
President Hassan Rohani said that "world powers have recognized Iran's nuclear rights" and cited the opening of "new horizons."
"The right of the Iranian nation to uranium enrichment is on Iran's soil," Rohani said in a televised address. "Whoever wants can make his own interpretation of this right. In the text of the agreement it is stated clearly that Iran will keep enriching uranium. For that reason, I announce to the Iranian people that Iran's enrichment activities will continue as before."
The so-called P5+1 group -- Britain, China, France, Russia, the United States, and Germany -- have been offering Iran limited relief from international sanctions in exchange for suspending aspects of its nuclear program.
Some Iranians offered cautious optimism in reactions sent to RFE/RL's Radio Farda.
"I'm very happy about the agreement between the Islamic republic and world powers," said one Iranian via telephone. "I hope it doesn't turn out to be a fake deal."
Others spoke to the economic pressure that has resulted from four rounds of UN sanctions and U.S. and other unilateral sanctions targeting Iran's nuclear program.
"The enemy is ourselves," an Iranian told Radio Farda. "By God, America and Europe are not our enemies. Now that you have reached a deal, please make goods cheaper."
Another expressed skepticism that the deal marked any change of heart in Tehran, asking American President Barack Obama, "Mr. Obama, do you think after years of economic sanctions and internal and external pressures, Iran will end [its] nuclear program?"
The talks, which entered their fifth day on November 24, had been stalled over Iran's insistence that any agreement acknowledge its "right" to enrich uranium.
"After intense negotiations, we have reached agreement today on a joint plan of action which sets out an approach toward reaching a long-term, comprehensive solution," Euopean Union foreign policy chief Catherine Ashton announced in a joint statement. "We agreed that the process leading to this comprehensive solution will include a first step of intial, reciprical measures to be taken by both sides for a duration of six months."
WATCH: EU foreign policy chief Catherine Ashton announced the deal at a press conference in Geneva early on November 24:
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Ashton: Iran Nuclear Deal First Step To Create Environment For Comprehensive Solution
Speaking from the White House in Washington, Obama said the deal offers a "dignified path" for Iran to "rejoin the international community."
"Today we have a real opportunity to achieve a comprehensive, peaceful settlement and I believe we must test it," the U.S. president said. "The first step that we have taken today marks the most significant and tangible progress that we have made with Iran since I took office. And now we must use the months ahead to pursue a lasting and comprehensive settlement that would resolve an issue that has threatened the our security and the security of our allies for decades."
A White House "fact sheet" on the "first step understandings" said Iran had agreed to halt all uranium enrichment above 5 percent and to neutralize its existing stockpile of near-20 percent enriched uranium below 5 percent within six months. Iran also agreed not install any new centrifuges for enrichment and not to commission the disputed Arak heavy-water reactor, the statement said.
Rohani, a relative moderate who took office in August with expectations high following two terms under hard-line President Mahmud Ahmadinejad, noted that the apparent breakthrough came one day ahead of his 100th day as president.
Obama emphasized that United States is committed to the security of Israel, whose leadership has repeatedly cast doubt on the nuclear negotiations and their ability to brake Tehran's perceived nuclear intentions.
WATCH: U.S. President Barack Obama hailed the deal as the first time in nearly a decade that "we have halted the progress of the Iranian nuclear program," and warned of a "ratcheting up" if Tehran failed to meet its commitments in the next six months:
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Obama Hails Iran Nuclear Deal As Step Toward Comprehensive Solution
Netanyahu warned that "what was achieved last night in Geneva is not a historic agreement -- it is a historic mistake."
He went on: "Today the world has become a much more dangerous place because the most dangerous regime in the world has taken a significant step towards obtaining the most dangerous weapon in the world. For the first time the leading powers in the world have agreed to uranium enrichment in Iran, ignoring [UN] Security Council resolutions that they themselves had led."
Netanyahu added that "Israel has many friends and allies, but when they are mistaken, it's my obligation to speak out clearly and openly and say so."
Russian Foreign Minister Sergei Lavrov lauded the deal, saying it would benefit all sides. "Nobody lost, everyone ends up winning," Lavrov said.
The Chinese Foreign Ministry said in a statement the agreement with Tehran would "help safeguard peace and stability in the Middle East."
Beijing's statement said the deal will also "help parties to begin carry out normal exchanges with Iran, and will help provide better life for the Iranian people."
