The Saudi Arabia-led coalition fighting Yemeni rebels has said it will launch an investigation after more than 140 people were killed in air strikes on a funeral in the capital, Sanaa.
It would "immediately investigate this case" along with US experts.
Saudi Arabia earlier denied allegations from the rebel Houthi-run government that the coalition was responsible.
The attack targeted the funeral of the father of Houthi-appointed Interior Minister Galal al-Rawishan.
The Saudi-led coalition said in a statement: "The coalition will immediately investigate this case along with the Joint Incidents Assessment Team in Yemen and experts from the United States who participated in previous investigations."
It referred to "reports about the regrettable and painful bombing" in Sanaa, before adding: "The coalition confirms that its troops have clear instructions not to target populated areas and to avoid civilians."
