REPUBLIKA.CO.ID, CAIRO - Leaders of Islamic nations called for a negotiated end to Syria's civil war at a summit in Cairo that began on Wednesday, thrusting Egypt's new Islamist president to center stage amid turbulence at home.

The summit of the 57-member Organisation of Islamic Cooperation opened on a day when the assassination of a leading Tunisian opposition politician highlighted the fragility of "Arab Spring" democratic revolutions in North Africa.

Tunisian President Moncef Marzouki canceled his trip to the Cairo meeting after Shokri Belaid, a staunch secular opponent of the moderate Islamist government, was shot dead outside his home, triggering street protests.

With Iranian President Mahmoud Ahmadinejad making an ice-breaking visit to Egypt after 34 years of estrangement, the two-day meeting was focusing on how to stop the bloodshed in Syria, where President Bashar al-Assad counts Tehran as one of his last allies.

In a keynote address, Egyptian President Mohamed Mursi called on "the ruling regime" in Damascus to learn the lessons of history and not put its interests above those of the nation, saying that rulers who did so were inevitably finished. Mursi urged all OIC members to support the Syrian opposition's efforts to unite and bring about change.

Heavy fighting erupted in Damascus on Wednesday as opposition group launched an offensive against Assad's forces, breaking a lull in the conflict, opposition activists said.

Ahmadinejad earlier told Egyptian journalists there could be no military solution and he was encouraged that the Syrian government and opposition were moving towards negotiations to end a conflict in which at least 60,000 people have died.

"Fortunately in Syria at the moment matters between the two parties - the opposition and the government - are heading towards establishing the idea of dialogue and talking together," al-Ahram daily quoted him as saying.

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