Iran said Tuesday it is willing to attend an upcoming peace conference on Syria, arguing all influential parties must be included in the process for it to be a success.

"The condition for success in Geneva is that all countries with influence on events in Syria participate," foreign ministry spokesman Abbas Araqchi told reporters.

Saudi Arabia on Tuesday executed five Yemenis and displayed their bodies in public for killing a national and forming a gang that committed robberies across several towns in the kingdom, the interior ministry said.

The five were executed in the southwestern town of Jizan, bringing the number of people executed in the kingdom this year to 46, according to an Agence France Presse tally.

Violence in Iraq, including a bombing near a mosque, killed 18 people on Tuesday, officials said, the latest in a spate of unrest that has cost more than 370 lives so far this month.

The bomb near a mosque in Abu Ghraib, west of Baghdad, killed five people and wounded at least 16, officials said.

Syria's army destroyed an Israeli military vehicle which it said had crossed the sensitive ceasefire line in the Golan Heights on Tuesday, the military said in a televised statement.

"Our armed forces have destroyed an Israeli vehicle with everything that it had in it... The vehicle had crossed the ceasefire line and was moving towards the village of Bir Ajam, situated in the liberated Syrian zone" of the Golan, it said.

Algerian Prime Minister Abdelmalek Sellal on Monday broke official silence on the health of President Abdelaziz Bouteflika, saying he is convalescing in Paris after a mini-stroke and was "never in danger".

"I would like to reassure our compatriots on the state of health of the president of the republic... he was never in danger and his health is improving day by day," Sellal said in a statement carried by the APS news agency.

Secretary of State John Kerry was returning to the Middle East Monday, aiming to shore up peace efforts as he seeks to help end the Syria war and coax Israel and the Palestinians back to talks.

The new top U.S. diplomat -- making his fourth visit to Israel in a little over three months -- left Andrews Air Force Base in Maryland, first headed for key Gulf ally Oman, which also maintains close ties to Iran.

Britain remains committed to amending the EU arms embargo on Syria, Foreign Secretary William Hague said Monday, but stressed it had taken no decisions to provide weapons to the rebels.

He said it was important to demonstrate to Syrian President Bashar Assad's regime that "no option is off the table" if he failed to agree a political solution to end the bloodshed.

The United States on Monday condemned both the Syrian government's assault on the rebel stronghold of Qusayr and the close involvement of Hizbullah in the attack.

"The United States strongly condemns the Assad regime's intense air and artillery strikes this weekend on the Syrian town of Qusayr along the Lebanese border," State Department deputy spokesman Patrick Ventrell said.

Bombings at two Shiite mosques south of Baghdad killed 13 people on Monday, police and a doctor said, the latest in a string of attacks targeting both Sunni and Shiite places of worship in Iraq.

One bomb exploded inside Al-Wardiyah mosque in the city of Hilla, while a suicide bomber detonated an explosives-rigged belt at Al-Graita mosque nearby, the sources said.

The Iraqi cabinet on Monday said elections will be held on June 20 in Anbar and Nineveh -- two of the six provinces which did not vote during last month's provincial polls.

It said it has approved a proposal from the country's electoral commission to hold elections in these two provinces.