UNITED NATIONS >> The U.N. humanitarian chief condemned a Saudi-led coalition on today for carrying out two major airstrikes in Yemen in the last two weeks that killed dozens of civilians.

Undersecretary-General for Humanitarian Affairs Mark Lowcock said he echoed Secretary-General Antonio Guterres’ call for “an impartial, independent and prompt investigation into these most recent incidents.”

He said a coalition airstrike on Thursday killed at least 22 children and four women fleeing fighting in Al Durayhimi district in Hodeida governorate. An additional airstrike in Al Durayhimi on Thursday killed four children, he said.

On Aug. 9, coalition airstrikes hit a bus in a busy market in Yemen’s north, killing at least 51 people including 40 children. The attack drew broad international condemnation and the coalition said it would investigate.

The conflict in impoverished Yemen began with the 2014 takeover of the capital of Sanaa by Houthi Shiite rebels, which toppled the internationally recognized government. A Saudi-led coalition allied with the government has been fighting the Iranian-aligned Houthis since 2015.

Civilians have borne the brunt of the conflict which has pushed Yemen to the brink of famine, crippled the country’s health system, and killed over 10,000 people.

The Houthis had blamed Thursday’s attack in Hodeida on the coalition. But state media of the United Arab Emirates, a key coalition member, disputed the claim and said the rebels launched the attack, killing one child and injuring dozens.

Neither side’s claims could be independently verified, but Lowcock’s statement put the blame on the coalition.

He stressed that the humanitarian operation in Yemen is currently the largest in the world, with three-quarters of the population in need of aid. In 2018, he said, the U.N. and its partners assisted more than 8 million people.

Lowcock expressed deep concern at the proximity of attacks to humanitarian sites including health facilities and water and sanitation operations.

“The parties to the conflict must respect their obligations under international humanitarian law and those with influence over them must ensure that everything possible is done to protect civilians,” he said.

Lowcock’s condemnation of the recent coalition airstrikes follows the release earlier today of a 90-page report by Human Rights Watch accusing the Saudis and others of failing to conduct credible investigations into alleged war crimes committed in Yemen or redress the toll on civilians.