Jihadists shot dead two people in a car they stopped at a roadblock near Roman ruins in Tunisia and two policemen who later sped to the scene, the interior ministry said Sunday.

The killings occurred on Saturday night in the Jendouba area of western Tunisia near Bulla Regia, the site of historic Roman ruins, it said in a statement.

Most of the Syrian opposition fighters in the Palestinian refugee camp of Yarmuk in southern Damascus have withdrawn, a Palestinian official told Agence France Presse on Sunday.

Anwar Abdel Hadi, an official with the Palestine Liberation Organization, said the pullout came after an agreement between the rebels and Palestinian factions in Yarmuk.

Gaza's ruling Hamas movement has ruled out the idea of international troops being stationed in a future Palestinian state under a peace deal with Israel.

"From time to time we hear people making offers during the negotiations, primarily about the idea of an international force following the retreat of the (Israeli) occupier," Hamas spokesman Sami Abu Zuhri said in a statement published on Saturday.

Firebrand Shiite cleric Moqtada al-Sadr, leader of a powerful political movement and a major figure in the formation of post-Saddam Iraq, has announced his exit from politics two months before legislative polls.

"I announce my non-intervention in all political affairs and that there is no bloc that represents us from now on, nor any position inside or outside the government nor parliament," Sadr said in a written statement received by Agence France Presse on Sunday.

Egypt's deposed president Mohammed Morsi charged he was being muzzled in a soundproof dock at the start of his trial on espionage charges Sunday, as his defense lawyers staged a protest walk-out.

The court adjourned the trial, the third for the Islamist since his July 3 ouster, to February 23 to allow the lawyers' syndicate to appoint new lawyers.

Nearly 200 men evacuated from Syria's Homs city and held by security services will receive religion classes to "modify their incorrect interpretation of Islam", the provincial governor said Saturday.

Talal Barazi told Agence France Presse the 179 men in custody would receive religious instruction, along with support sessions from psychologists.

Red Cross chief Peter Maurer voiced alarm Saturday over the chaos surrounding the evacuation from the besieged Syrian city of Homs, urging the warring sides to respect basic humanitarian law.

"I am concerned about the conditions in which the evacuations took place and about the number of people who remain trapped and unaided between front lines throughout Syria," Maurer, the president of the International Committee of the Red Cross, said in a statement.

President Abdrabuh Mansur Hadi on Saturday lashed out at the "below-par" performance of Yemen's security services, after 29 inmates including suspected al-Qaida members escaped from Sanaa central prison.

The prison break after an assault on Thursday unmasked a lack of improved security at the facility, despite vows by al-Qaida in the Arabian Peninsula (AQAP) chief Nasser al-Wuhayshi last year to free incarcerated members of his group.

The U.N.'s agency for Palestinian refugees UNRWA on Saturday urged renewed access to the Yarmuk camp in the Syrian capital Damascus, a week after operations to distribute aid were halted.

"We have been unable to distribute food in Yarmuk for over a week now, which is potentially disastrous for the besieged civilians there, trapped by the conflict and desperately dependent on UNRWA," spokesman Chris Gunness said.

Britain's Foreign Secretary William Hague on Saturday blamed President Bashar Assad's regime for the breakdown in talks between Syria's warring sides, calling the situation a "serious setback" for peace.

"The failure to agree an agenda for future rounds of talks ... is a serious setback in the search for peace in Syria, and the responsibility for it lies squarely with the Assad regime," Hague said in a statement.