The fifth round on inter-reconciliation dialogue between rival Fatah and Hamas movements' leaders will start later on Saturday in Egypt amid less optimistic.

The delegations of the two movements arrived in Cairo on Friday night coming from Gaza, Damascus and Ramallah to attend the scheduled three-day dialogue.

According to the two movements' officials, the four basic issues that both sides failed to agree upon previously, are expected to be discussed in this fresh round of negotiations in Cairo.

The four issues are related to forming a unity government that ends the rift between Hamas-ruled Gaza and the Fatah-dominated the West Bank. The parties have not yet agreed on the political platform of the government will have.

The system of the general elections, the rehabilitation of the security apparatuses and reforming Palestine Liberation Organization (PLO) are also on the agenda of the dialogue.

"In case an agreement is reached between Fatah and Hamas, the other Palestinian factions will be immediately invited to join thedebates and sign the reconciliation deal," said Fatah leader in Cairo Nabil Shaath.

He added that the most two outstanding issues are the formation of a new unity government that joins both Fatah and Hamas, and the rehabilitation and building up the Palestinian National Authority (PNA) security forces.

Talking about the system of the upcoming general elections, Shaath predicted that the parties would accept an Egyptian proposal to hold the elections on the bases of 75 percent proportional and 25 percent on constituencies.

The system of the last elections held in 2006, when Hamas won amajority and ousted President Mahmoud Abbas Fatah movement, was 50percent proportional and 50 percent constituencies.

Two governments headed by Hamas were formed, but an international embargo was imposed on the two governments because Hamas rejected to abide by the Quartet requirements, mainly the recognition of Israel.

Meanwhile, Hamas negotiator Mohamed Nasser said his movement opposes Fatah proposal related to rehabilitating the security apparatuses, which said to form a transitional joint security force for both Gaza and West Bank.

"This proposal is rejected because we support the principle of forming permanent and professional security apparatuses for both Gaza and West Bank," Nasser said in a press statement.

He added that this session of dialogue would witness deeper and more comprehensive dialogue, where all proposals, questions and answers will be studied and discussed.

The Palestinian schism widened in 2007 after Hamas, which won the elections a year before, routed pro-Abbas forces and seized control of the Gaza Strip, effectively cutting the political ties with the West Bank.

Palestinian observers voiced less optimistic that even if a reconciliation agreement is signed among the factions, mainly between Fatah and Hamas, there will be many difficulties that will face implementing the agreement.

Hassan Abdo, a Palestinian analyst specialized in Middle East affairs said that although there is the longing for the dialogue, but there are three main reasons that would hinder to reaching an agreement.

"The international community won't deal with a government that Hamas is part of it, the Arab world's division into two centers, the moderate and the opposition and the narrow factional disputes in Gaza and West Bank," he said.

However, Egypt which has been hosting the inter-Palestinian dialogue since 2005, is exerting tremendous efforts to bridge gaps between the factions and help them reach an agreement as soon as possible.

"Egypt would do all its best in order to make the dialogue successful and to help the parties reach a reconciliation agreement that ends the current situation," said Shaath.

(Xinhua News Agency May 16, 2009)