Saudi Arabia issues air raid alert in Riyadh, explosions heard: AFP

Explosions were heard in Riyadh on Saturday, an AFP journalist reported, after an air raid alert was issued by Saudi Arabian authorities, who have been regularly targeted in recent days by attacks from pro-Iranian Houthis in Yemen.

"The area is under a hostile aerial threat," a message received by residents of the Saudi capital read.

This is the first time the capital has been directly affected since the conflict in neighboring Yemen intensified in July.