A suicide bombing in Yemen's southern city of Ibb has killed at least 33 people, medical sources say. <br /> <br />The blast appeared to be targeted at a cultural centre where members of the Houthi rebel group were gathered for a religious celebration. <br /> <br />The governor of Ibb was thought to be among the injured, reports said. <br /> <br />The Houthis, a Shia Muslim group, overran Yemen's capital Sanaa earlier this year, and have extended their influence in the following months. <br /> <br />They have clashed with several tribal and Sunni militia groups, and have been fighting Sunni militants from al-Qaeda in the Arabian Peninsula (AQAP) since they overran the AQAP stronghold Radaa in October. <br /> <br />No group has said it carried out Wednesday's attack. However, the Houthis have blamed AQAP for previous attacks. <br /> <br />Mohammed Abdel-Baki, a spokesman for the Houthis, described the suicide bombing as a "massacre".
