AMMAN - 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.