The five permanent members of the UN Security Council on Tuesday called upon the warring parties in Yemen to implement the Hodeida peace deal, reached by two rivals last December in Sweden, "without seeking to exploit the redeployment by the other side".
The UNSC members hope, by this move, to make progress that would lead to an end to the 4-year war between the internationally recognized Saudi-backed government and the Iranian-backed Houthi rebels.
The Chinese, French, Russian, British and US ambassadors to Yemen said in a statement they were "extremely concerned" that the agreement had not been implemented, according to Reuters.
"We ... urge both parties to begin implementation of the proposal in good faith without further delay," they said.
"We call on all sides to ensure the UN monitoring mission can carry out its work safely and without interference."
Parties to the nearly 4-year war in Yemen, after 8 days of peace talks in Sweden,reached on the 13th of last December an agreement providing for ceasefire in Hodeida and redeployment of both sides' forces andallowing for UN leading role in the port city.
They also agreed to swap prisoners and alleviate blockade imposed by Houthis on Taiz.
Ceasefire in Hodeida City went into effect on the 18th of December, and is stillholding,but other provisions under the agreement have been stalled so far, with both sides trading blames for trying to thwart the deal.
The city of Hodeida and its three ports have been under Houthi control since late 2014, while Yemeni joint forces loyal to legitimate government and Arab coalition have massed at the city's fringes seeking to retake the strategic port.
Saudi Arabia has been leading a military coalition in Yemen since 26 March 2015, in support of forces loyal to President Hadi to retake areas controlled by Houthis seen as proxy for Iran in the Arab Peninsula country.
The conflict has left hundreds of thousands killed or injured and 3 million displaced, pushing the country to the world's worst humanitarian crisis,according to the UN, with most of the population in need for a type of humanitarian aid and immediate protection, including 8.4 million people unsure how to get next meal, and some 2 million children suffering severe shortage of nutrition.