Terrible explosions in Riyadh and the urgent warning of the United States The second wave of massive explosions rocked the Saudi capital this morning, and at the same time the United States warned its citizens in Saudi Arabia of the possibility of "massive and large attacks" in the coming hours. The spokesman of the Saudi coalition, while confirming the missile attack on Riyadh, claimed that one of the missiles was intercepted. He previously announced the air attack on Riyadh and the interception of a drone.