Saudi Civil Defense had sent an alert to residents in several parts of the country overnight, warning of potential danger and advising people to remain indoors and away from windows. The Saudi government media office did not immediately respond to a request for comment. Key points and original sources are listed below.

• Saudi Civil Defense had sent an alert to residents in several parts of the country overnight, warning of potential danger and advising people to remain indoors and away from windows.S1

• The Saudi government media office did not immediately respond to a request for comment.S2

• A plume of smoke and flames rose near Riyadh's main international airport on Saturday and residents reported hearing loud booms hours after Saudi authorities issued the first alert for the country's capital since the latest escalation with Yemen's Iran-backed...S3

• Internewscast Internewscast Smoke and flames were seen rising near Riyadh’s international airport today amid… This Post: Smoke and Flames Rise Over Riyadh Airport in Saudi Arabia first appeared on InternewscastS4

• Flames, smoke seen near Riyadh airport after Saudi warning of aerial attack threatS5

• Saudi Arabia has issued a string of emergency alerts across the kingdom after warning of a "hostile aerial threat".S6

• RIYADH, Sept 19 (Reuters) - A large plume of smoke was visible near Riyadh's main airport on Saturday after booms were heard and Saudi Arabia sent alerts overnight warning of potential danger around the capital, amid an escalation in attacks by Yemen's Houthi...S7

• Black smoke and flames rose near Riyadh's international airport on Saturday, as a flight tracking website reported cancellations and delays at the hub, hours after Saudi authorities issued an air raid alert. Firefighters could be seen trying to extinguish the...S8