The vast majority of the protesters were Houthi rebels , according to Mohammed Abdulsalam , a spokesman for the group . Three army tanks also attacked the protesters , witnesses said . The majority of the protesters are Houthi fighters . The Houthis are Shiite Muslims and followers of slain cleric Hussein al - Houthi .
Three army tanks also attacked the protesters , witnesses said . The majority of the protesters are Houthi fighters . The Houthis are Shiite Muslims and followers of slain cleric Hussein al - Houthi .