
IMAGE SOURCE EPA image caption Houthi rebels have been fighting Yemen’s government since 2014 (file picture)
One was destroyed over the eastern city of Dammam, where falling shrapnel injured two children and damaged buildings, the defence ministry said.
The Houthis – who frequently mount such cross-border attacks – said they had targeted Saudi oil facilities.
The other attacks were aimed at oil sites in the southern provinces of Jizan and Najran, the group said.
There are no immediate reports of impact on Saudi oil facilities.
In 2019, the rebels claimed responsibility for a drone attack on two facilities run by Saudi state-owned oil company Aramco. It temporarily reduced crude oil production by 5.7 million barrels a day – about half the kingdom’s output at the time.
The UN has called the civil war there the world’s worst humanitarian crisis. As of March 2020, it had verified the deaths of at least 7,700 civilians, most caused by Saudi-led coalition air strikes.