A Saudi-led coalition fighting in Yemen has killed 109 civilians in airstrikes in the past 10 days, including 54 people at a crowded market and 14 members of one family on a farm, the top U.N. official in the country said Thursday.

The fighting is futile and absurd, U.N. resident coordinator Jamie McGoldrick said, in unusually direct criticism of the campaign being waged by the coalition against the Iran-aligned Houthi movement.

The Saudi-led coalition, which is backed by the United States, Britain and others, denounced the charges, saying the information lacked credibility. McGoldrick appeared to be taking the Houthi side in the conflict, the Saudis said.