Saudi Arabia has called the strikes on Abqaiq and Khurais facilities as a test of global will to preserve international order, and will look to form a united front at the United Nations General Assembly in New York next week.
Mohammed Abdul-Salam, spokesman for the Houthis, posted on his telegram account graphic photos that showed bodies under the rubble. Abdul-Qader el-Murtaza, a rebel official, said there were 170 captured government fighters in the detention center.
It was not immediately clear who was behind the airstrikes but the government side blamed the UAE, which has armed and trained separatist militias in southern Yemen. Officials in the UAE declined to immediately comment.
Analysts say Riyadh and Abu Dhabi differ over how to move forward in Yemen. The UAE, the kingdom's main military ally on the ground for most of the war, in June scaled down its military presence under pressure from Western allies to end the conflict.
The missile hit in the city's neighbourhood of Breiqa where a military parade was underway by forces loyal to the United Arab Emirates, a member of the Saudi-led coalition that has been fighting the Iran-backed Houthi rebels since 2015 in support of Yemen's internationally recognized government.
The suffering of children caught up in the Yemen conflict has become "simply appalling," according to a UN report. It says thousands of kids have been killed, recruited as soldiers and subjected to devastating violence.
Many Yemenis who have fled their homes and farms in and around Hodeidah to head north to the Houthi-held capital Sanaa or to safer areas along the western coast and the southern port city of Aden said that they are struggling to survive.