Israeli Prime Minister Benjamin Netanyahu declared Tuesday that the deal being negotiated between world powers and Iran would leave Tehran free to develop nuclear weapons.

In an impassioned address to the U.S. Congress, conducted even as Secretary of State John Kerry was in nuclear talks in Switzerland with his Iranian counterpart, Netanyahu branded Iran a global threat.

The United States is not planning to follow its Gulf partners and move its embassy in Yemen to the southern city of Aden, a top State Department official said Tuesday.

Washington closed its mission in the capital Sanaa earlier this month in the face of growing unrest, moving all its remaining American staff out of Yemen.

Iran's foreign minister rejected Tuesday as "unacceptable" remarks by U.S. President Barack Obama who said a minimum 10-year nuclear deal offered the best hope of avoiding an atomic-armed Tehran.

Mohammad Javad Zarif was speaking in Switzerland, where he and U.S. Secretary of State John Kerry met for a second day to seek a framework for a deal to rein in Tehran's nuclear program by a March 31 deadline.

Twenty people from an opera company were killed after a bus fell off a cliff in China early Tuesday, state media reported.

Another 13 were injured in the accident in Linzhou in the central province of Henan, the official Xinhua news agency said, citing the local government.

The United States will be ready to "protect" moderate Syrian rebels possibly with air power once they enter into combat, a top U.S. official said Monday.

Retired U.S. general John Allen, President Barack Obama's envoy to the international coalition fighting the Islamic State group, insisted that once moderate Syrian rebels were vetted, trained and armed, they would not be abandoned on the battlefield.

Police were investigating Monday after three armed men made off with gold bars worth more than $4 million in an audacious highway heist, U.S. media said.

About 275 pounds (125 kilos) of gold was taken from a truck on Sunday in Wilson County, North Carolina, after the vehicle pulled over because of mechanical problems, local news reports said.

Cyprus on Monday blasted the tweet of the U.S. ambassador to the island over the killing of Russian opposition figure Boris Nemtsov while President Nicos Anastasiades was visiting Moscow.

The ambassador, John Koenig, wrote Sunday on Twitter: "What do people in #Cyprus think about the week in Russia as seen from here? Anastasiades visit and statements, #Nemtsov assassination?"

Top diplomats from Iran and the U.S. began a new round of marathon talks on a nuclear deal late Monday, as Israeli leader Benjamin Netanyahu warned the emerging accord could threaten his country's survival.

U.S. Secretary of State John Kerry and Iranian Foreign Minister Mohammad Javad Zarif met in a Swiss lakeside hotel for a series of sessions which are scheduled to stretch into Wednesday afternoon.

U.S. Secretary of State John Kerry on Sunday urged Russia to carry out a "thorough, transparent, real investigation" into the murder of Russian opposition leader Boris Nemtsov, a fierce critic of President Vladimir Putin.

Nemtsov was shot dead in Moscow on Friday, just two days before he was to have led a major opposition rally against the government.

An Emirati woman has been referred to court on charges of murdering one American in an Abu Dhabi mall and attempting to kill another at his home, officials said Sunday.

Alaa Bader Abdullah is accused of stabbing to death teacher Ibolya Ryan, 47, in a shopping mall restroom and attempting to murder another American, a doctor of Egyptian origin, by planting a bomb outside his apartment.