Sanctions-hit Iran on Tuesday called for the destruction of all atomic weapons in the world after North Korea announced that it had staged its most powerful nuclear test yet.

"We need to come to the point where no country has any nuclear weapons and at the same time all weapons of mass destruction and nuclear arms need to be destroyed," foreign ministry spokesman Ramin Mehmanparast said when asked for a response to Pyongyang's claim to have detonated a "miniaturized" device.

Security forces on Monday arrested two daughters of opposition figure Mir Hossein Mousavi who along with his wife is under house arrest, an opposition website reported.

"Security forces raided the home of Zahra and Narges, and arrested them in the morning," Kaleme.com, which is close to Mousavi, said without citing a source.

Bassam al-Dada, an adviser to the commander of the rebel Free Syrian Army, has denied reports that the kidnapper of Lebanese pilgrims in Syria was killed.

Al-Liwaa daily on Monday quoted al-Dada as saying that Amar al-Dadikhi of the rebel North Storm brigade, also known as Abu Ibrahim, who last May kidnapped 11 Lebanese pilgrims on their way home from Iran, was being held in Turkey.

Iran and Hizbullah, are trying to build a network of militias inside Syria to protect their interests there in case President Bashar Assad falls, The Washington Post reported late Sunday.

Citing unnamed U.S. and Middle Eastern officials, the newspaper said Iran's goal appears to be to have reliable operatives in Syria in case the country fractures into ethnic and sectarian enclaves.

Yemen's national security chief on Saturday accused Iran of "damaging Yemen" as the interior ministry said it was pursuing a probe into an Iran-linked arms shipment which was seized last month.

"Such a shipment cannot be made by traders or smugglers... Only an official power stands behind it," national security chief Ali Hassan al-Ahmedi told reporters in Sanaa.

New U.S. Secretary of State John Kerry on Friday said the window of diplomacy remains open for Iran as it prepares to meet later this month with world powers for new talks on its nuclear program.

"The choice is really ultimately up to Iran," Kerry told his first press conference since becoming America's top diplomat this week.

Iran has freed a Slovak citizen who was arrested last year on allegations of spying for the U.S. Central Intelligence Agency and paraded on state television.

"I am no spy and Iran only knows why they accused me of spying," 26-year-old Matej Valuch told reporters at a press conference in Bratislava on Friday after his release.

Iran's ambassador to Bulgaria reiterated Friday that Tehran was in no way involved in a bomb attack that killed five Israelis in July, after Sofia blamed Hizbullah.

"The Burgas attack has nothing to do with Iran," Gholamreza Bagheri told reporters, adding that his country "condemned terrorism in all its forms."

U.N. sanctions experts are investigating the Yemeni government's claims that Iran supplied rockets and explosives seized from a ship last month, diplomats said Thursday.

The case was raised at a U.N. Security Council meeting where U.N. special envoy Jamal Benomar called on the 15-member body to end "acts of obstruction" to the country's democratic transition.

Iranian state television has aired video footage that it says was extracted from a CIA drone it captured inside the Islamic republic's airspace in December 2011.

In a documentary broadcast Wednesday, the elite Revolutionary Guards released the video, the first time it has been seen since the RQ-170 Sentinel was captured after it entered Iranian airspace from its eastern border with Afghanistan.