The US State Department pledged on Sunday to help Saudi Arabia defend against attacks on its territory. As it condemned a failed attack on Riyadh.
"We are gathering more information, but it appears to have been an attempt to target civilians;" the State Department said about the failed attack.
"Such attacks contravene international law and undermine all efforts to promote peace and stability," it also said in a statement.
It also pledged to "help our partner Saudi Arabia defend against attacks on its territory and hold those who attempt to undermine stability to account."