French Foreign Minister Jean-Marc Ayrault on Friday hailed "real progress" in Syria but said peace talks cannot resume unless the ceasefire is fully respected and until all Syrians have access to aid.

"We want a speedy resumption of the negotiations in Geneva, but two conditions must be fulfilled: access for all Syrians to humanitarian aid, and full respect of the ceasefire," Ayrault said after meeting in Paris with his British, German and EU counterparts.

A Turkish court on Friday sentenced two Syrian people smugglers to more than four years in prison over the drowning of Aylan Kurdi, the toddler who became a symbol of Europe's refugee crisis when his lifeless body washed up on a Turkish beach.

The court in the resort town of Bodrum found Syrian nationals Muwafaka Alabash, 36, and Asem Alfrhad, 35, guilty of trafficking migrants and sentenced them to four years and two months, the Dogan News Agency said.

War-torn Syria was hit Thursday by a nationwide power cut, state television reported, but the cause was not immediately known.

"Electricity has been cut across all provinces and teams are trying to determine the reason for this unexpected cut," the station reported, citing a source within the electricity ministry.

A car bomb killed at least 18 members of a Western-backed rebel coalition in southern Syria on Wednesday, a monitoring group said.

Four leaders of the Syrian Revolutionaries Front were among the dead after unknown assailants targeted the group in a village in Quneitra province, the Syrian Observatory for Human Rights reported.

In Syria's second city Aleppo, rescue workers have been taking advantage of the quiet to play football outside. For the first time in years, they have no one to save.

Speaker Nabih Berri voiced on Saturday his support for the ceasefire deal that was reached in Syria, hoping that it will pave the way for peace in the neighboring country.

He said in a statement: “Peace in Syria will allow Lebanon to overcome its crises.”

The Russian military said its warplanes suspended all sorties over Syria on Saturday in line with a ceasefire deal brokered by Russia and the United States, to avoid any "bombing mistakes".

The Russian and American militaries also exchanged maps of Syria, while fighting stopped in 34 Syrian settlements, the military said.

Saudi jets on Friday arrived at a Turkish base to join the air campaign against Islamic State jihadists in Syria only hours before a ceasefire is to take force, local media reported.

Four F-15 jets landed at Incirlik air base in the Adana province in southern Turkey, the state-run Anatolia news agency reported.

Kurdish forces in Syria, where they have been targeted by Turkish artillery, said Thursday they would respect a ceasefire due to start this weekend but retain the right to "retaliate" if attacked.

"We, the People's Protection Units (YPG), give great importance to the process of cessation of hostilities announced by the United States and Russia and we will respect it, while retaining the right to retaliate... if we are attacked," YPG spokesman Redur Xelil said on his Facebook page.

Syrian President Bashar Assad's main regional ally Iran said Wednesday that it was confident his regime would respect a planned ceasefire brokered by Moscow and Washington.

"From the start of the crisis in Syria, Iran has always insisted on a ceasefire," Deputy Foreign Minister Hossein Amir Abdollahian said, quoted by the official news agency IRNA.