Syria's government and the Kurdish-led Syrian Democratic Forces on Saturday extended their truce by 15 days, with Damascus saying it was to support the US transfer of Islamic State group detainees from Syria to Iraq.
Several sources had earlier told AFP the truce would be prolonged, with a Syrian official in Damascus citing the same reason.
In a statement, the Syrian defence ministry said the 15-day extension would take effect at 11pm (2000 GMT) on Saturday.
"The extension of the ceasefire comes in support of the American operation to transfer Islamic State detainees from SDF prisons to Iraq," the statement added, referring to the SDF,
The SDF also confirmed the extension, saying it was reached "through international mediation, while dialogue with Damascus continues".
"Our forces affirm their commitment to the agreement and their dedication to respecting it, which contributes to de-escalation, the protection of civilians, and the creation of the necessary conditions for stability," it said in a statement.