The militant Yemeni al-Qaida in the Arab Peninsula is reportedly claiming responsibility for a March suicide attack on South Korean officials investigating an earlier bombing that killed four South Korean tourists and a Yemeni driver. In an announcement posted on various Islamic militant Web sites Sunday, the group said a suicide bomber named Shamel al-Sanani carried out the March 18 attack in an effort to highlight the inability of Yemeni security to protect the South Koreans. Yemeni officials said no one was hurt in the attack on the investigators, who were looking into the March 15 attack against the tourists. The statement's authenticity could not be independently verified. Yemeni authorities have blamed al-Qaida for the attacks.