The UN envoy to Yemen known as Wednesday for “extreme engagement” to uphold the struggle-torn us of a’s truce, which has provided a unprecedented respite from violence.

Hans Grundberg spoke at the end of his first visit to the rebel-held capital, in which he held talks with Huthi rebellion leaders.

The two-month ceasefire took effect 11 days ago.

“While we see that the truce is broadly holding, we need to be mindful of the challenges, too,” the Swedish diplomat warned at the end of his three-day visit.

“We are relying on the parties’ continued commitment and serious engagement in upholding the truce.”

The renewable ceasefire comes seven years after a Saudi-led coalition began its military intervention in Yemen, after the Iran-backed Huthis took control of swathes of the country including Sanaa in 2014.

Grundberg said oil tankers had begun arriving at the port of Hodeida, one of the terms of the truce intended to ease the “fuel crisis” in Sanaa and elsewhere.

“Intense work” is underway for Sanaa airport’s first commercial flight in six years, another feature of the pause in fighting, Grundberg said, while talks have started on reopening key roads in Taiz and other governorates.

“Despite reported violations that we are concerned about, we have seen a significant overall reduction in hostilities and no confirmed reports of air strikes or cross-border attacks,” Grundberg added.

In another hopeful signal, Yemen’s president last week handed his powers to a brand new leadership council tasked with protecting peace talks with the rebels.

More than a hundred and fifty,000 people are anticipated to have been immediately killed and millions displaced via the preventing, triggering what the United Nations calls the arena’s worst humanitarian disaster.