Nov 8 (Reuters) - Multiple loud booms were heard in the Saudi capital Riyadh shortly after Civil Defense issued an early-warning alert of a potential threat, a Reuters witness said, as hostilities between the kingdom and Yemen's Iran-aligned Houthis persisted.
Saudi Civil Defense later said the danger had passed.
(Reporting by Jana Choukeir and Timour Azhari; Editing by William Mallard)
