At least 20 people were killed when Shi’ite Muslim rebels clashed with army soldiers and allied tribesmen in an outer suburb of the Yemeni capital of Sanaa, tribal and medical sources said on Wednesday.

Tribal sources told Reuters the rebels had gained control of Wadi Dhahr suburb in the fighting, the latest in an escalating conflict between the Sunni-dominated government and Houthi Shi’ites fighting for more territory and control in the north.

The conflict is further destabilizing a country struggling with a range of threats, including a separate secessionist movement in the south and an al Qaeda insurgency. […]