Fifty-four migrants trying to reach Italy died of thirst when their inflatable boat ruptured in the Mediterranean, according to testimony from the sole survivor, the U.N. refugee agency said.

The rescued man, who drank sea water to survive, was spotted clinging to a jerry can and the remains of the stricken boat off the Tunisian coast on Monday night by fishermen who alerted the coast guard, the UNHCR said.

Egypt's Supreme Constitutional Court froze on Tuesday a presidential decree reinstating the Islamist-led parliament, hours after the lower house convened in defiance of the judiciary and military.

The top court's decision is expected to heighten a crisis that has raged since President Mohamed Morsi, a former member of the powerful Muslim Brotherhood, issued the decree Sunday just eight days after taking office.

Red Crescent staffer Khaled Khaffaji, shot during overnight in the Syrian province of Deir Ezzor, died on Tuesday, bringing to 56 the number of deaths across the strife-torn country, monitors said.

The Red Cross Red Crescent condemned Khaffaji's killing, saying "this is the second time in less than a month that a member of the Red Crescent has been killed while on duty."

The United States is aware of a Russian naval flotilla headed for a Syrian port but does not yet see cause for concern, the White House said Tuesday.

"We currently have no reason to believe this move is anything out of the ordinary but we refer you to the Russian government for more details," Erin Pelton, a spokeswoman for the National Security Council, told Agence France Presse.

Iran expressed concern on Tuesday over what it called "violent actions" by Saudi security forces against demonstrators from the country's Shiite minority, in which two people were killed.

Tehran is "concerned by the violent actions carried out by Saudi forces against religious figures and the population" in the heavily Shiite east of the country, foreign ministry spokesman Ramin Mehmaparast was quoted by state news agency IRNA as saying.

In Syria's rebel-held city Qusayr, which has been besieged by government forces for months, the shelves are empty and the market practically destroyed as residents prepare for a difficult Ramadan.

"There are only 50 grocery stores still standing in the whole of Qusayr, and their shelves are empty," sighs merchant Nadim, with the annual fasting month just days away.

The Syrian authorities freed on Tuesday 275 prisoners who were "involved" in the popular uprising against President Bashar Assad, state TV reported.

"The authorities have freed 275 prisoners involved in recent incidents, but none of them have blood on their hands," the state broadcaster said.

The Libya trial of ex-intelligence chief Bouzid Dorda, the first of Moammar Gadhafi’s top officials to face justice, was postponed again on Tuesday after the defense team asked for more time to review his case.

"The trial was postponed until August 28 to allow the defense to study the case," defense lawyer Saleh al-Faituri said.

Yasser Arafat's widow is to file a lawsuit in France following allegations the Palestinian leader died at a Paris hospital in 2004 after being radioactively poisoned, her lawyers said on Tuesday.

"Mrs. Suha Arafat, widow of Palestinian leader Yasser Arafat, has asked a Parisian legal practice to file suit against an unnamed person under French jurisdiction," lawyer Pierre-Olivier Sur's practice said in a statement.

U.N.-Arab League peace envoy Kofi Annan met top Iranian officials Tuesday before flying to Iraq, as he sought the help of key regional players in shoring up his tattered peace plan for Syria after meeting President Bashar Assad.

Annan underlined Tehran's importance in international efforts to stem the bloodshed, following talks with Iran's Foreign Minister Ali Akbar Salehi.