NEW : Blast believed to be that of a suicide bomber , who died at a hospital , official says . `` Yemen will counter the evil of terrorism with honor and bravery , '' Adel Al-Suneini , charge d'affaires for the embassy , said in the statement . NEW : Officials blame al Qaeda but say public will fight back . Bombing targeted cadets in Aden , the capital of Yemen . At least 19 people also wounded , an official says .
NEW : Blast believed to be that of a suicide bomber , who died at a hospital , official says . NEW : Officials blame al Qaeda but say public will fight back . Bombing targeted cadets in Aden , the capital of Yemen . At least 19 people also wounded , an official says .