The UN Special Envoy Martin Griffiths has stressed that the UN would continue to uphold its commitment in achieving a comprehensive political settlement for Yemen conflict and restoring the country's security and stability.
Yemen has been racked by an armed conflict that broke out after the Iranian-backed Houthis had ousted the internationally recognized government late in 2014.
The conflict escalated after a Saudi-led coalition intervened militarily in the country in March 2015 to reinstate the government of President Hadi.
In a letter addressed to Yemeni President Hadi, Griffiths said on Sunday "the UN is seriously addressing any challenges that might hinder the progress of the Stockholm Agreement."
Parties to the 4-year war in Yemen, after 8-day peace talks in Sweden, reached on the 13th of last December an agreement providing for ceasefire in Hodeida and redeployment of both sides' forces, exchanging prisoners and alleviating blockade imposed by Houthis on Taiz.
But none of this has taken place so far, with both sides trading blames for trying to thwart the deal.
The UN envoy to Yemen congratulated the Yemeni president and parliament members for the session held in Seyoun, which comes in a critical turning as part of collective, intense efforts to revive the political process and end the conflict in Yemen.
"While Stockholm deals represent tangible progress towards that goal, we are still completely aware of delays occurred in implementing those deals," he added.
Last week, Griffiths urged all parties to exert every possible effort to end civilians' suffering and allow for Yemeni people to live peacefully.
A political comprehensive solution can only end violence and destruction, he said on Twitter.
Yemen 4-year war has left tens of thousands killed, hundreds of thousands injured, and 3 million displaced, triggering what the UN calls the world's worst humanitarian crisis, with most of the population in need for a type of humanitarian aid and immediate protection, including 14 million people risking famine and some 1.8 million children suffering malnutrition.