Story highlights Diplomats from the United States, Russia and other nations met in Munich to try to hammer out a deal

"What we have here are words on paper. What we need to see in the next few days are actions on the ground," official says

The proposed ceasefire would not apply to terrorist organizations in Syria

(CNN) Major world powers have agreed to a "cessation of hostilities" and to the delivery of immediate aid in Syria, U.S. Secretary of State John Kerry announced early Friday.

He spoke in Munich, Germany, where top diplomats from more than a dozen countries, including the United States and Russia, met to hammer out a deal.

"I'm pleased to say that as a result today in Munich, we believe we have made progress on both the humanitarian front and the cessation of hostilities front, and these two fronts, this progress, has the potential -- fully implemented, fully followed through on -- to be able to change the daily lives of the Syrian people," Kerry said.

The #ISSG agreed that urgent delivery of humanitarian aid in #Syria will begin this week. — John Kerry (@JohnKerry) February 12, 2016

#ISSG also agreed that cessation of hostilities will begin in one week, after consultations by Syrian parties. — John Kerry (@JohnKerry) February 12, 2016

Important that the #ISSG agreed to these commitments - but success will mean implementing them as soon as possible. — John Kerry (@JohnKerry) February 12, 2016

"First, we have agreed to accelerate and expand the delivery of humanitarian aid beginning immediately," he told reporters.

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