SANA, Yemen — The United Nations’ humanitarian aid official in Yemen said Monday that the civilian death toll in the nearly two-year conflict has reached 10,000, with 40,000 others wounded.

Jamie McGoldrick of the Office for the Coordination of Humanitarian Affairs told reporters that the figure is based on lists of victims gathered by health facilities.

The announcement marks the first time a UN official has confirmed such a high death toll in Yemen, the Arab world’s poorest nation. Earlier, the UN reported 4,200 civilians were killed in the war.

‘‘This once more underscores the need to resolve the situation in Yemen without any further delay,’’ UN deputy spokesman Farhan Haq said in New York. ‘‘There’s been a huge humanitarian cost.’’

The Yemen conflict pits Shi’ite Houthi rebels and allied forces against a Saudi-led coalition. The coalition began an air campaign in March 2015 to restore the internationally recognized government that fled the country after Houthis seized the capital.

McGoldrick’s remarks come as the UN special envoy to Yemen, Ismail Ould Cheikh Ahmed, arrives in the southern city of Aden.

Associated Press