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John Kerry: Syria's New Nationwide Cease-Fire Becomes Effective At Sundown Monday

GENEVA (CBSNewYork/AP) — The United States and Russia early Saturday announced a breakthrough agreement on Syria that foresees a nationwide cease-fire starting next Monday, followed a week later by an unlikely new military partnership between the rival governments targeting the Islamic State and al-Qaida.

U.S. Secretary of State John Kerry said shortly after midnight that 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 cease-fire begins at sundown Sept. 12, Kerry said, coinciding with the Muslim Eid al-Adha holiday.

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 Bashar Assad's government was prepared to comply.

"This is just the beginning of our new relations," Lavrov said.

The deal culminates months of frenetic diplomacy that included four meetings between Kerry and Lavrov since Aug. 26, and a lengthy face-to-face in China between Presidents Barack Obama and Vladimir Putin. The arrangement hinges on Moscow pressuring Assad's government to halt all offensive operations against Syria's armed opposition and civilian areas. Washington must persuade "moderate" rebels to break ranks with the Nusra Front, al-Qaida's Syria 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.-Russian counterterrorism alliance, only a year after Obama chastised Putin for a military intervention that U.S. officials said was mainly designed to keep Assad in power and target more moderate anti-Assad forces.

Russia, in response, has chafed at America's financial and military assistance to groups that have intermingled with the Nusra Front on the battlefield. Kerry said it would be "wise" for opposition forces to separate completely from Nusra, a statement Lavrov hailed.

"Going after Nusra is not a concession to anybody," Kerry said. "It is profoundly in the interests of the United States."

The military deal would go into effect after both sides abide by the truce for a week and allow unimpeded humanitarian deliveries. Then, the U.S. and Russia would begin intelligence sharing and targeting coordination, while Assad's forces would no longer be permitted to target Nusra any longer; they would be restricted to operations against the Islamic State.

The proposed level of U.S.-Russian interaction has upset several leading national security officials in Washington, including Defense Secretary Ash Carter and National Intelligence Director James Clapper, and Kerry only appeared at the news conference after several hours of internal U.S. discussions.

At one point, Lavrov said 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 last 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.

Getting Assad's government 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's government 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.

Kerry outlined several steps the government and rebels would have to take. They must now pull back from demilitarized zones, and allow civilian traffic and humanitarian deliveries.

But as with previous blueprints for peace, Saturday's plan appears to lack enforcement mechanisms. Russia could, in theory, threaten to act against rebel groups that break the deal. But if Assad bombs his opponents, the U.S. is unlikely to take any action against him given Obama's longstanding opposition to entering the civil war.

In addition to those killed, Syria's conflict has chased millions of people from their homes, contributing to Europe's worst refugee crisis since World War II. Amid the chaos of fighting between Syria's government and rebels, the Islamic State group has emerged as a global terror threat.

(TM and © Copyright 2016 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2016 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)

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