“Secretary of State John Kerry and his Russian counterpart, Sergey V. Lavrov, announced that they had agreed on the delivery over the next few days of desperately needed aid to besieged Syrian cities, to be followed by a ‘cessation of hostilities’ within a week on the way to a more formal cease-fire.”
Source: U.S. and Russia Announce Plan for Humanitarian Aid and a Cease-Fire in Syria – The New York Times