As violence in Syria on Friday (June 29th) killed at least 25 people, Kofi Annan called for the international community and all parties in Syria to "act positively for peace", AFP reported.
"It is abundantly clear that the violence will not stop without joint, sustained pressure from those with influence, including consequences for noncompliance," the UN-Arab League joint special envoy to Syria wrote in an article published in the Washington Post Friday.
Speaking ahead of a Saturday conference on Syria, which will include several permanent members of the United Nations Security Council, Annan outlined a potential road map for a solution to the Syria crisis.
He proposed a national unity government that "could include members of the present government and the opposition and other groups" but exclude "those whose continued presence and participation would undermine the credibility of the transition and jeopardise stability and reconciliation".
After a national dialogue and the writing of a new constitution, multi-party elections would be held, he wrote.
Meanwhile, regime forces on Friday continued their attacks on the Damascus suburb of Douma, according the Syrian Observatory for Human Rights.
Two civilians were killed during "continued bombardment by regime forces attempting to gain control" of the capital's suburb, the Observatory reported.
The killings follow at least 40 deaths reported in Douma on Thursday.
Protestors also staged demonstrations across the country in the face of government crackdowns.
"Regime troops surrounded a number of mosques in the capital to prevent protests after Friday prayers," the Observatory said, adding that four people were arrested as security forces dispersed a demonstration outside a mosque in the Mezze district of Damascus.
Other demonstrations occurred in Aleppo, Deraa, Deir ez-Zor, Homs, Latakia and Idlib provinces, the last of which saw hundreds of people gathered in the town of Kfar Nubul calling for the ouster of President Bashar al-Assad.
At least 25 people were reportedly killed Friday, the Observatory said. The death toll follows one of the bloodiest days since unrest began nearly 16 months ago, with 183 reported dead on Thursday.