'A turning point': U.S., Russia announce Syrian ceasefire plan

The United States and Russia announced early Saturday a breakthrough agreement on Syria that foresees a nationwide ceasefire starting early next week, followed by an unlikely new military partnership between the rival governments targeting ISIS and al-Qaeda.

U.S. Secretary of State John Kerry said the plan could reduce violence in Syria and lead to a long-sought political transition, ending more than five years of bloodshed. He called the deal a potential "turning point" in a conflict that has killed as many as 500,000 people, if complied with by Syria's Russian-backed government and U.S.-supported rebel groups.

The ceasefire begins at sundown Monday, Kerry said, coinciding with the Muslim Eid al-Adha holiday.

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Kerry's negotiating partner, Russian Foreign Minister Sergey Lavrov, confirmed the agreement and said it could help expand the counterterrorism fight and aid deliveries to Syrian civilians. He said Syrian President Basharal-Assad's government was prepared to comply.

Counterterrorismalliance

The deal culminates months of frenetic diplomacy that included four meetings betweenKerryandLavrovsince Aug. 26. The arrangement hinges on Moscow pressuringAssad'sgovernment to halt all offensive operations against Syria's armed opposition and civilian areas. Washington must persuade "moderate" rebels to break ranks with theNusraFront,al-Qaeda'sSyria affiliate, and other extremist groups.

Both sides have failed to deliver their ends of the bargain over several previous truces.

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But the new arrangement goes further by promising a new U.S.-Russiancounterterrorismalliance, only a year after U.S.PresidentBarackObamachastised Russia for a military intervention that U.S. officials said was mainly designed to keepAssadin power and target more moderateanti-Assadforces.

The deal includes intelligence sharing and targeting co-ordination, a level of U.S.-Russian interaction that has upsetseveral leading national security officials in Washington, including Defence Secretary Ash Carter and National Intelligence Director James Clapper. The joint military work would only begin after several days of adherence to the newceasefire.

The UN special envoy for Syria said he welcomed the agreement.

"The United Nations hopes that the political will that led to this understanding is sustained. It creates a real window of opportunity which all relevant actors in the region and beyond should seize to put the crisis in Syria on a different path and ease the violence and suffering being endured by the Syrian people,"Staffan de Mistura said.

He called on both countries tofacilitate UN efforts to deliver humanitarian aid to Syrians in hard-to-reach and besieged areas.

"It is vital that real change is felt on the ground by the Syrian people."

Pizza and vodka

At one point,Lavrovsaid he was considering "calling it a day" on talks, expressing frustration with what he described as an hours-long wait for a U.S. response. He then presented journalists with several boxes of pizza, saying, "This is from the U.S. delegation," and two bottles of vodka, adding, "This is from the Russian delegation."

The Geneva negotiating session, which lasted more than 13 hours, underscored the complexity of a conflict that includes myriad militant groups, shifting alliances and the rival interests of the U.S. and Russia, Saudi Arabia and Iran, and Turkey and the Kurds.

GettingAssad'sgovernment and rebel groups to comply with the deal may now be more difficult as fighting rages around the divided city of Aleppo, Syria's most populous and the new focus of a war that has killed as many as 500,000 people.

Assad'sgovernment appeared to tighten its siege of the former Syrian commercial hub in the last several days, seizing several key transit points.

Forty days of fighting in Aleppo has killed nearly 700 civilians, including 160 children, according to a Syrian human rights group. Volunteer first responders said they pulled the bodies of nine people, including four children, from rubble following air raids Friday on a rebel-held area.

In addition to killing hundreds of thousands, Syria's conflict has chased millions of people from their homes, contributing to Europe's worst refugee crisis since the Second World War. Amid the chaos of fighting between Syria's government and rebels, ISIS has emerged as a global terror threat.