The US warned of drone and missile attacks against Saudi Arabia's capital Riyadh on Wednesday.
Saudi Arabia has been the target of sporadic attacks launched from its neighbor Yemen by the Iran-backed Houthi militia.
In detail the US Embassy in Saudi Arabia's warning of attacks; came on Wednesday as the Arab Coalition said it had destroyed six bomb-laden drones; launched by the Iran-backed Houthi militia toward the Kingdom.
The Arab Coalition additionally said it had intercepted a futher three ballistic missiles targeting the southern cities of Jazan; Najran and Khamis Mushait.
The coalition also said it is taking the necessary measures to protect civilians and civilian objects.
"The terrorist Houthi militia, and those who stand behind it; are continuing their crimes through attempts to target civilians and civilian objects. Such terrorist attempts are blatant contraventions to the customary International Humanitarian Law and flagrant contradictions of humanitarian values;" the coalition said in a statement.
In fact the attacks come amid an intensification in fighting as the Houthis try and seize control of the oil-rich Marib province; which is the UN-recognized government's last stronghold in the north of the country.
The Houthis seized control of the capital Sanaa in 2015.