Hours after the airstrike warning was issued in the Saudi capital, black smoke and flames were seen near Riyadh's international airport.

Hours after the airstrike warning was issued in the Saudi capital, black smoke and flames were seen near Riyadh's international airport.

This is the first time since the recent escalation of clashes with the Houthis in Yemen that residents have been warned and asked to stay at home.

Reports of major problems have been published at King Khaled International Airport, and flight tracking website Flytradar24 has reported long delays and flight cancellations. The Saudi government has yet to make any official statement on this.