Iraq and Iran are aiding the Syrian regime financially in its crackdown on protests, a former official in President Bashar Assad's regime alleged Thursday in a report on al-Jazeera's website.

Mahmoud Suleiman Haj Hamad made the allegations at a press conference in Cairo after announcing his defection from the regime, according to the satellite network's Arabic-language website.

Egyptian prosecutors on Tuesday portrayed ousted president Hosni Mubarak as a "tyrannical leader", as they made their opening arguments in his murder trial.

The ailing 83-year-old former strongman, who was wheeled into court on a stretcher, is accused of involvement in the deaths of protesters during the uprising that overthrew him in February.

Syria finally gave its agreement Monday to an Arab observer mission to monitor a deal to end nine months of bloodshed, ending weeks of prevarication that had prompted the Arab League to adopt sanctions.

Syrian Deputy Foreign Minister Faisal al-Maqdad and Arab League Assistant Secretary General Ahmed Ben Helli inked the document at League headquarters in Cairo, an Agence France Presse correspondent reported.

The rival Palestinian movements Fatah and Hamas began meeting in Cairo on Sunday to discuss ways of implementing a stalled reconciliation deal, an official said.

Delegates from the two factions met "to prepare for the comprehensive dialogue" which is to take place on Tuesday in the Egyptian capital, Azzam al-Ahmed, head of the Fatah delegation told Agence France Presse.

The Arab League on Saturday threatened to take Syria to the U.N. over its deadly crackdown on dissent but an Iraqi mediator said he had "positive" talks in Syria aimed at defusing the nine-month crisis.

The Qatari prime minister warned that the Arab League would take Syria to the U.N. Security Council if it persisted in refusing to allow observers into the country to monitor the protection of civilians.

The Arab League expects the Damascus regime to sign up "soon" to an observer mission intended to monitor the protection of civilians, the bloc's number two Ahmed Ben Helli said on Saturday.

"There are positive signs... I expect the signing will happen soon," Ahmed Ben Helli told AFP ahead of a meeting of an Arab League ministerial commission in Qatar.

An Arab League committee met on Wednesday to decide on a list of Syrian officials who will be banned from Arab countries and whose bank accounts will be frozen, a league official said.

The committee met in the Arab League's Cairo headquarters to press ahead with sanctions against Damascus over a bloody crackdown on protesters who want the ouster of President Bashar al-Assad.

Post-revolution Egypt headed to the polls Monday for a chaotic election clouded by violence and a political crisis, the start of a long process to bring democracy to the Arab world's most populous nation.

Ten months after the end of 30 years of autocratic rule by Hosni Mubarak, ousted by popular protests in one of the seminal events of the Arab Spring, up to 40 million voters are being asked to choose a new parliament.

Syrian forces killed at least 15 civilians on Sunday, six of them in the flashpoint region of Homs that has been under siege for several weeks in an operation to crush dissent, a rights group said.

The latest violence came as the Arab League voted to impose a raft of diplomatic and economic sanctions against President Bashar al-Assad's regime for defying an ultimatum to allow observers into the country.

Palestinian leader Mahmoud Abbas and Hamas chief Khaled Meshaal on Thursday hailed a new era of partnership between their two rival movements at talks in Cairo aimed at cementing a stalled a unity deal.

Speaking to reporters after several hours of talks, the two leaders said they had managed to iron out their differences and turn over a new page in their strained relationship.