15 soldiers are killed and four wounded by suspected al Qaeda militants in an attack on an army checkpoint in southeastern Yemen.
Saudi Arabia intercepts a ballistic missile attack over its capital Riyadh and bomb-laden drones targeting the southern province of Jizan, both of which were launched by Yemen's Houthi rebels backed by Iran.
Clashes and air strikes are reported in Yemen despite a fragile truce between the government and Houthis taking effect. However, the truce appears to be largely holding as members from the International Red Cross and Red Crescent Movement are granted unhindered access to give humanitarian aid and personnel across the country.
Houthi forces regain several positions across southern Yemen after launching a fresh offensive against loyalist and coalition forces. In Lahij province, which borders Aden, Houthi forces are now positioned on a hill overlooking the strategic Al Anad Air Base, which houses Sudanese forces. The Houthis also retook the Damt District in the Dhale province after besieging it for hours, at least 16 people were killed in the clashes.
A suicide bomber attacks soldiers rehearsing for the annual Unity Day parade in the Yemeni capital Sana'a, killing at least 120 people and injuring more than 350 others. Al-Qaeda in the Arabian Peninsula claims responsibility.