The eyes of the world are on Syria as a ceasefire agreement continues to hold.
The Syrian government and rebels have signed up to deal brokered by the United States and Russia, despite concerns raised by rebels.
Hours before the ceasefire, Syrian President Bashar Assad said he is determined to recover all areas of the country from terrorist groups.
US Secretary of State John Kerry and his Russian counterpart Sergei Lavrov have agreed to extend a ceasefire agreement in Syria by 48 hours to allow for increased humanitarian access.
State Department spokesman Mark Toner said: "There was agreement that as a whole, despite sporadic reports of violence, the arrangement is holding, and violence is significantly lower.
"As part of the conversation they agreed to extend the cessation for another 48 hours."
The UN's special envoy to Syria said that Bashar Assad's government was preventing life-saving deliveries during a national ceasefire.
The US and Russia have agreed on a cessation of fighting in Syria from 12 September and hope Syrian sides resume diplomatic negotiations.