At least 30 people have been killed in Yemen during intense fighting between Sunni tribesmen and Shia Houthi fighters in the southern province of Bayda.
The gun battle erupted on Monday as the tribesmen, believed to be backed by al-Qaeda fighters, launched a counter attack to push back the Houthis who have been expanding their control of the city of Radaa, a predominantly Sunni area.
In recent weeks, the Houthis have launched operations against al-Qaeda fighters in the area, where US forces have also carried out drone attacks targeting top commanders of the armed group.