NATO hailed the Iran nuclear deal as a "historic breakthrough" that would strengthen global security, but urged Tehran to comply with the terms of the accord.
Iranian President Hassan Rouhani said the conclusion of a nuclear deal with the major powers was "very close" after more than two weeks of intensive talks in Vienna.
Russian President Vladimir Putin said he believed global powers and Iran will "soon" reach a compromise in talks on Tehran's nuclear programme.
US Secretary of State John Kerry said he was prepared to "call an end" to nuclear talks with Iran if "tough decisions" are not made.
A nuclear deal with Iran has "never been closer", Iranian Foreign Minister Mohammad Javad Zarif said in a message.
US President Barack Obama warned he will "walk away" from a bad nuclear deal with Iran, as Tehran and six world powers gave themselves until July 7 to reach an agreement.
EU foreign policy chief Federica Mogherini said all sides had shown the political will needed to strike a nuclear deal with Iran, praising the "good results" despite a day of tough talks.
Top US diplomat John Kerry warned there would be no deal with Iran if it fails to satisfy all lingering questions about its nuclear program, as he prepares to head back to tough negotiations.
US top diplomat John Kerry and his Iranian counterpart will Saturday launch a new high-stakes diplomatic drive to nail down an unprecedented nuclear deal.
Iran warned global powers against making "excessive demands" in talks aimed at sealing a ground-breaking nuclear deal.
President Barack Obama donned a yarmulke and pitched his nuclear deal with Iran and the case for a Palestinian state directly to US Jews.
Iranian Foreign Minister Mohammad Javad Zarif voiced optimism about reaching a nuclear deal with world powers.
The Israeli parliament late narrowly approved Prime Minister Benjamin Netanyahu's new government.
Kazakhstan mulls limiting cash transactions between sole proprietors to 1,000 MCI or 1,982,000 tenge ($10,667).
Nuclear powers join non-nuclear nations to launch a conference on non-proliferation, buoyed by the Iran deal but alarmed by slow-moving US-Russian disarmament.
Israeli Prime Minister Benjamin Netanyahu again denounced the agreement between Tehran and world powers.
Rosatom was ready to provide Tehran with new reactor fuel and process spent rods.
Iran and six world powers have agreed the framework of a potentially historic deal aimed at curbing Tehran's nuclear drive.
Ukraine's President Petro Poroshenko slammed a month-old peace deal with pro-Russian rebels as "not working".
Israeli Prime Minister Benjamin Netanyahu arrived in Washington for a "historic" quest to stop a "bad" international nuclear deal with Iran sought by the US.