The U.N.'s humanitarian chief in Yemen says none of the warring parties there are fulfilling their obligations to protect civilians or facilitate humanitarian assistance.

Jamie McGoldrick spoke to reporters Wednesday, one day after airstrikes by a Saudi-led coalition struck a busy market in a northern region controlled by Shiite Houthi rebels, killing and wounding dozens. The Houthi-controlled state news agency, SABA, said at least 65 people were killed and 55 wounded.

Yemen's war pits the Houthis and troops loyal to a former president against the internationally-recognized government and an array of allied forces. A Saudi-led coalition entered the war on the government's side a year ago.

The fighting has killed more than 6,200 civilians and displaced millions, pushing the Arab world's poorest country to the brink of famine.