NEW : Eight people were killed in the suicide bombing , officials say . Comment: The Islamist militia Al-Shabaab claims responsibility for the attack . The radical group has staged several other recent attacks in the nation .
NEW : Eight people were killed in the suicide bombing , officials say . The Somali interior minister was not with the delegation , his office says . The Islamist militia Al-Shabaab claims responsibility for the attack . The radical group has staged several other recent attacks in the nation .