The Trump administration has reviewed the US's support for the Arab Coalition in Yemen, and has "determined that it is the right thing to do", US Defense Secretary Jim Mattis said at a Pentagon briefing on Tuesday.
The experts have also chronicled the damage from coalition airstrikes over the a year ago.
A report for the Human Rights Council also pointed to crimes by Houthi rebels but said the single most lethal force against Yemeni civilians was the coalition's bombing and shelling of schools, hospital and markets.
"Children are the most vulnerable - poverty, coupled with violence and insecurity, render them defenseless and exposed to exploitation and abuse by parties to the conflict", stated Charles Garraway, member of the Group of Eminent Experts on Yemen, .
The experts also said almost a dozen deadly airstrikes they investigated over the past year "raise serious questions about the targeting process applied by the coalition".
The U.N. report also accused the Houthi rebels of committing possible war crimes, including arbitrary detention, torture, ill treatment and the recruitment of child soldiers.
UAE's Minister of State for Foreign Affairs Anwar Gargash said in a tweet that the "coalition is fulfilling its role in reclaiming the Yemeni state and securing the future of the region from Iranian interference". It also said that the coalition's inspection procedures at the main port of Hodeidah had a "chilling effect on commercial shipping", that have resulted in limiting food shipments into Yemen, where 8.4 million people face starvation, it said. But its investigation showed that field commanders "routinely failed to consult with those in the (coalition) Joint Command holding information about the No-Strike Lists".
In a 41-page report published on Tuesday, the Group of global and Regional Eminent Experts on Yemen raised "serious concerns about the targeting process applied by the [Saudi-led] coalition".
"Coalition air strikes have caused most of the documented civilian casualties".
Saudi Arabia and its allies launched the war, code-named Operation Decisive Storm, against Yemen in March 2015 in an attempt to reinstall Hadi, a staunch ally of Riyadh, and crush the Houthi Ansarullah movement. The U.N. Refugee Agency said it's ramping up efforts to meet what it calls the most urgent protection needs of thousands of families displaced by fighting in the strategic port city for aid into Yemen. It also said the Saudi Air Force had not cooperated with investigators about its targeting procedures.