Syria's military command has declared the US-Russian brokered ceasefire over, blaming the country's rebel groups for undermining the agreement.
In a statement on Monday, the Syrian military said that "armed terrorist groups" repeatedly violated the ceasefire which came into effect last week.
It said the armed groups also took advantage of the truce to mobilise and arm themselves while attacking government-held areas.
The statement said the rebels wasted a "real chance" to stop the bloodshed.
Activists and rebel groups also accuse the government of violating the ceasefire.
The UN said the Syrian government has obstructed the delivery of aid, a key component of the deal.