Amnesty on Friday renewed calls for Iran to release two young U.S. hikers held on spying charges since July 2009, two days ahead of a fresh hearing in their case.

"Iranian authorities have held these men for two years, subjecting them to legal proceedings that fall far short of international fair trial standards," the London-based organization said.

Israeli President Shimon Peres accused on Tuesday Iran of seeking to control the Middle East through Hizbullah and Hamas.

He said in an address to the Arab and Muslim world on the occasion of the month of Ramadan: “Tehran does not want the establishment of a stable Middle East, but it wants to take control of it through stirring tensions through Hizbullah in Lebanon and Hamas in the Gaza Strip.”

Iranian Foreign Minister Ali Akbar Salehi said on Friday that he hoped "misunderstandings" with Saudi Arabia could be resolved after a war of words erupted over its military intervention in Bahrain.

Salehi said that Iran respected the sovereignty of Sunni-ruled Shiite-majority Bahrain and hoped that a national dialogue launched by King Hamad after the March crackdown on Shiite-led protests would bear fruit.

The prosecutor investigating the worst terror strike on Argentine soil, the 1994 bombing of a Jewish charities building that killed 85 people, urged Iran Saturday to hand over any suspects in the case.

The comments came after an Iranian Foreign Ministry statement said earlier in the day that Tehran, suspected by Argentina of being behind the attack, is "ready for a constructive dialogue" in the case and to cooperate with the Argentine government.

Iran is ready to cooperate with Argentina over a 1994 bombing attack on a Jewish community centre in Buenos Aires that killed 85 people, the foreign ministry announced on Saturday.

Tehran, suspected by Argentine prosecutors of being behind the attack, is "ready for a constructive dialogue and to cooperate with the Argentine government to shed all possible light" on the case, a statement said.

Iran and China on Saturday signed a series of agreements worth $4 billion (2.8 billion euros) for infrastructure projects as part of a broader bid to boost trade volume between the two nations, Iranian state media reported.

As part of a $500 million (354 million euros) deal, China agreed to provide Iran with 60 energy recovery incinerators, which are to be installed within a year in major cities and in Iran's northern tourism hub along the Caspian sea.

The presidents of Afghanistan, Iran and Pakistan agreed on Saturday to join forces in combating terrorism, in a joint statement issued after three-way talks in Tehran.

"All sides stressed their commitment to efforts aimed at eliminating extremism, militancy, terrorism, as well as rejecting foreign interference, which is in blatant opposition to the spirit of Islam, the peaceful cultural traditions of the region and its peoples' interests," the statement said.

Hizbullah is moving its arsenal from Syria over fears that the anti-Assad demonstrations would lead to regime change, a Western expert closely following up Iranian-Syrian ties told the French daily Le Figaro on Saturday.

The expert confirmed that Western intelligence had monitored the movement of trucks from the Syrian border to eastern Lebanon’s Bekaa valley.

Iran’s ambassador Ghazanfar Roknabadi said on Thursday that four Iranian diplomats, seized in 1982 by a Christian militia in Lebanon, are still alive and being held in Israel.

“We believe that they are alive in Israeli jails. That’s why we have asked the Lebanese government to seriously follow-up the issue,” Roknabadi said following talks with Foreign Minister Adnan Mansour.

International condemnation of Syria mounted Saturday after its security forces reportedly killed more than 80 people in one of the bloodiest days of a month-long uprising.

Russia, Italy and Greece joined the chorus of criticism which includes U.S. President Barack Obama and U.N. chief Ban Ki-moon, as well as France and the European parliament.