Saudi Arabia labels attempted attack on Mecca a "red line" as Iran-backed Houthis deny involvement amid escalating tensions.

Muslim nations are condemning an attempted drone attack on Mecca as Saudi Arabia says that Islam's holiest city is a “red line” for the kingdom.

Houthi forces seized Perim island and key positions along Yemen's Bab al-Mandab Strait as Saudi Arabia urged Trump to take direct military action.