Iran is moving "closer and closer" to building a nuclear weapon and Israel may have to act before the United States does, Israel's Prime Minister Benjamin Netanyahu warned on Sunday.

"They're edging up to the red line. They haven't crossed it yet," Netanyahu said on CBS News's "Face the Nation."

Iraq lacks the means to stop Iranian arms deliveries to Syria through its airspace, if there are any, Iraqi Foreign Minister Hoshyar Zebari said in comments published on Saturday.

"Last September we started to inspect Iranian and Syrian planes at random. We have found non-lethal materials, like equipment, medicine and food," Zebari said in an interview published by the Asharq al-Awsat newspaper.

Some arrived in Porsches or BMWs, which were whisked away by valet parking attendants. The hotel lobby was awash with the celebrated and powerful including A-list actors, well-known artists and captains of commerce.

For one glimmering moment late last month, the Iranian capital was the talk of the world's art market after 80 works sold for $2 million, astonishing a country whose economy is battered by Western sanctions but still has pockets of wealth looking for investment havens for their money.

The United States and Israel on Thursday slammed a bid by Iran and Syria to get seats on the U.N. Human Rights Council.

Acting U.S. ambassador to the United Nations, Rosemary DiCarlo, called the campaigns "highly inappropriate" because of their records on human rights.

European Union foreign policy chief Catherine Ashton will hold talks in Brussels next week on Iran's contested nuclear drive with senior officials from six global powers, the first since Tehran elected a new president.

Ashton's spokesman Michael Mann said Ashton would meet on Tuesday with political directors from the group of nations that have been negotiating with Iran on its nuclear program.

Saudi Arabia appears to be targeting regional rivals Iran and Israel with ballistic missiles from a previously undisclosed desert base, a British-based defense analysis group said Thursday.

Satellite images show launch pads with some markings pointed towards potential Iranian targets and others towards possible locations in Israel, IHS Jane's Intelligence Review said.

An exiled Iranian opposition group claimed on Thursday to have evidence of a hidden nuclear site located in tunnels beneath a mountain near the town of Damavand, 70 kilometers (44 miles) northeast of Tehran.

The Paris-based militant group the People's Mujahedin of Iran (MEK), alleges the site has existed since 2006 with the first series of subterranean tunnels and four external depots recently completed.

Moderate cleric Hassan Rowhani will assume Iran's highest elected office on August 3, ending Mahmoud Ahmadinejad's controversial eight-year presidency, a deputy speaker of parliament said on Monday.

Rowhani will become president once supreme leader Ayatollah Ali Khamenei, the ultimate decision-maker in the Islamic republic, formally endorses his surprise June election.

Iran deems "unacceptable" the Egyptian army's toppling of the country's first freely elected president Mohammed Morsi, the foreign ministry said on Monday.

"The intervention of armed forces in political affairs is unacceptable and disturbing," ministry spokesman Abbas Araqchi told the Mehr news agency, when asked about the developments in Egypt.

U.S. Treasury Secretary Jacob Lew expressed hope the economic sanctions aimed at stopping Iran's alleged nuclear weapons program will work, because "the alternatives are worse."

Lew -- whose Treasury Department is tasked with enforcing the sanctions -- was speaking Sunday at a conference in Aspen, Colorado.