The EU tightened its sanctions on Iran on Monday, adding more than 100 firms to a blacklist of companies hit by an assets freeze over Tehran's disputed nuclear program, diplomats said.

EU foreign ministers adopted the new restrictive measures amid efforts to jump start international talks aimed at convincing Iran to halt its nuclear activities.

Europe tightened the noose on President Bashar al-Assad Monday, imposing sanctions on the Syrian leader for the first time while calling for quick Middle East peace talks as it responded to the Arab Spring.

Long reluctant to target the Syrian leader directly, the European Union's decision to slap an assets freeze and travel ban on Assad is the latest in a string of measures against his regime, though the effects are unclear.

Ministers from the Gulf Cooperation Council (GCC) announced Sunday they had suspended mediation efforts in Yemen, after the country's president failed to sign a transition deal for him to quit office.

The GCC had "decided to suspend their initiative in the absence of the propitious conditions," said a statement issued from Riyadh.

Funerals were held on Sunday for victims of a fierce Syrian government crackdown on anti-regime protests that killed about 50 people in two days, five of them in a funeral procession, activists said.

In the city of Homs, an epicenter in central Syria of the nine-week uprising against President Bashar al-Assad's regime, hundreds of protesters took to the streets, chanting "down with the regime," an activist said.

U.S. President Barack Obama vowed Sunday to "keep up pressure" on Iran to prevent it from obtaining nuclear weapons and forcefully defended his call for an Israeli-Palestinian peace based on pre-1967 frontiers, suggesting critics had misrepresented him.

Outlining U.S. and U.N. sanctions imposed on Iranian President Mahmoud Ahmadinejad's regime, Obama said Iran is now "virtually cut off from large parts of the international financial system."

A special Bahrain court upheld on Sunday death sentences for two Shiites convicted of killing two policemen during unrest that hit the Sunni-ruled kingdom, the official BNA news agency said.

"The National Safety Appeals Court upheld the death sentence Sunday against Ali Abdullah Hasan al-Singace and Abdul Aziz Abdullah Ibrahim Hussein," BNA reported.

Britain concluded its naval training mission in Iraq on Sunday, more than eight years after it contributed the second largest contingent of troops to the U.S.-led invasion that ousted Saddam Hussein.

Despite having pulled out the vast majority of its troops in mid-2009, Britain's Royal Navy has continued to train Iraqi personnel to defend their territorial waters and offshore oil installations.

EU foreign policy chief Catherine Ashton on Sunday vowed to offer the European Union's long term support to Libyan rebels, hours after NATO bombed the port of Tripoli and Moammar Gadhafi's compound near the capital.

Ashton, on a visit to the rebel-held eastern Libyan city of Benghazi, is to open a European Union mission office in a city hotel later Sunday and she will also address a news conference.

Yemeni President Ali Abdullah Saleh warned on Sunday of civil war if the opposition defied his call for them to be present at his palace for him to sign a Gulf deal on a transition of power, as pro-regime gunmen encircled a meeting of Arab and Western diplomatic mediators.

"If they remain stubborn, we will confront them everywhere with all possible means," he said in a televised address, moments before members of his ruling party were seen signing the Gulf Cooperation Council deal.

More than a dozen bomb attacks in and around Baghdad on Sunday left at least 18 people dead, including 12 people killed in a suicide attack, and 80 wounded.

The series of attacks comes just days after blasts against police in a tense northern city killed 29 people, with just months to go before all U.S. forces must withdraw from Iraq amid questions over whether local security forces are up to the task of maintaining stability in the war-wracked country.