The Syrian military has declared a halt in fighting in parts of the rebel-held Eastern Ghouta region outside Damascus.
The move came after Russia, an ally of the government, said it had reached an agreement with "moderate" rebels to de-escalate conflict in the area.
Analysts warn it is unclear whether the deal can be enforced.
Eastern Ghouta was one of four proposed "de-escalation zones" in a deal agreed between Russia, Iran and Turkey in May.
In a statement, the Syrian army said a cessation of hostilities in areas of Eastern Ghouta came into effect on midday local time on Saturday.
"The army will retaliate in a suitable manner to any violation," it said
source: bbc news