"If implemented and adhered to, this cessation will not only lead to a decline in violence, but also continue to expand the delivery of urgently needed humanitarian supplies to besieged areas and support a political transition to a government that is responsive to the desires of the Syrian people," Kerry stated.
On Monday, Russia and the United States announced a draft of the ceasefire agreement that calls for cessation of hostilities to begin at midnight on Saturday.
Syria’s main opposition group, the National Coalition of Syrian Revolution and opposition forces tentatively agreed to back the cessation of hostilities, with conditions.
The agreement excludes the terrorist groups Daesh, also known as the Islamic State, the al-Qaida affiliate Nusra Front and other groups designated as terrorist by the United Nations.
Violence in Syria continued over the weekend, with Daesh claiming responsibility for terrorist attacks in Homs and Damascus that killed at least 140 people.
More than 250,000 people have died in Syria’s civil war since fighting began in March 2011.