Houthi militiamen and soldiers stand behind a roadblock at the scene of a blast near the republican palace in Sanaa February 7, 2015. An improvised bomb exploded outside the republican palace in the Yemeni capital Sanaa on Saturday and wounded three Shi'ite Muslim militiamen guarding it, eyewitnesses said. The attack came a day after the Houthi Shi'ite militant group dissolved parliament and formally took power of the impoverished and strife-town Arabian Peninsula country. REUTERS/Khaled Abdullah (YEMEN - Tags: POLITICS CIVIL UNREST MILITARY)