NEW : Blast appeared to be work of a suicide bomber , who died at a hospital , official says . At least 19 people were wounded , four of them critically , the embassy said . NEW : A second blast occurred in the same area around an hour later and killed one person. Bombing targeted cadets in Sanaa , the capital of Yemen . At least 19 people also wounded , embassy official says .
NEW : Blast appeared to be work of a suicide bomber , who died at a hospital , official says . NEW : A second blast occurred in the same area around an hour later and killed one person. Bombing targeted cadets in Sanaa , the capital of Yemen . At least 19 people also wounded , embassy official says .