article_snippet: ISIS claimed responsibility for the attacks .
article_snippet: A suicide bomb attack on two mosques in Sanaa, Yemen, killed 137 people last week.
article_snippet: To make matters in Yemen even more complicated, militants loyal to the Islamic State announced the formation of a cell in Yemen after claiming responsibility for last week's massive multi-suicide bomber attack that left hundreds killed or injured in the capital Sanaa .
article_snippet: To make matters in Yemen even more complicated, militants loyal to the Islamic State the Islamic State announced the formation of a cell in the country after claiming responsibility for last week's massive multi-suicide bomber attack that left hundreds killed or injured in the capital Sanaalast week's massive multi-suicide bomber attack that left hundreds the capital Sanaa.
article_snippet: Four bombers wearing explosive belts targeted the Badr and al-Hashoosh mosques in  
article_snippet: At least 137 are dead and a further 351 people are thought to have been wounded in the devastating blasts, described by eyewitnesses as being like earthquakes.
article_snippet: A group claiming to be the Yemeni branch of ISIS immediately said A group claiming to be the Yemeni branch of ISIS were responsible for last week's multiple suicide bombings that targeted Shiite Houthi mosques in Sanaa and released images of A group claiming to be the Yemeni branch of ISIS logo as a way of declaring the formation of the cell.
article_snippet: The mosques are mainly used by supporters of the terror group as well as Sunni worshippers.