Jordan said on Monday it was discussing developments in southern Syria with Washington and Moscow and that all three parties agreed on the need to preserve a "de-escalation" zone they brokered last year and which has reduced violence.
A senior official who requested anonymity told Reuters the three countries that signed last year's deal to create the zone "saw eye to eye" on the need to preserve it as a key step to "accelerate efforts to reach a political solution" in Syria.
The truce -- the first US peacekeeping effort in the war under Donald Trump's presidency -- has reduced violence in a particularly sensitive region that includes Syrian territory bordering Israel.