Late on Friday and early Saturday, people in several cities in Saudi Arabia, such as Riyadh and Jeddah, received emergency alerts on their phones. The alerts warned them about a “hostile aerial threat,” which means something dangerous was flying in the sky. In Riyadh, people heard an explosion, but later, officials said the threat was over and there was no damage or loss of life.

Saudi authorities sent these alerts because, in recent days, drones and missiles were sent towards Saudi Arabia from Yemen. The main group launching these attacks is called the Houthi movement. Earlier this week, a drone was shot down over Taif province, and sadly, falling debris killed one person and hurt two others.

After the newest warning, people were told to stay alert and follow instructions. The situation in Saudi Arabia is important for the world because it is a large oil producer. Any more attacks could affect oil supplies, which may change prices for people in other countries too.