Sanaa: Two Yemeni soldiers were killed on Thursday when Al Houthi tribal fighters attacked an army base near the capital Sanaa, military sources said.

Another four soldiers were injured in the attack, the sources added, as sectarian fighting that flared up in October in the north spread closer to Sanaa.

Four Al Houthi rebels were also injured, they said.

Yemen deployed soldiers to the northeastern part of the capital this week after at least 40 people were killed in clashes between Al Houthis and Sunni tribesmen.

Mediators have been trying to persuade the warring parties to retreat from positions they were holding near Sanaa and replace them with government soldiers without any success.

Fighters loyal to the Shiite Al Houthi tribe, who have fought government forces since 2004, are trying to tighten their grip on the north as Yemen — home to one of Al Qaida’s most active branches — moves towards a federal system that gives more power to regional authorities.

Gulf states and the United States are particularly concerned about violence in the Western-allied country as it shares a long border with top oil exporter Saudi Arabia and its coast runs alongside Red Sea and Gulf of Aden shipping lanes.