A suicide bomber on foot entered a government office and blew himself up Monday in the volatile south, killing eight people, including four policemen, officials said. The district police chief was among the seven people wounded in the attack on the Nad Ali district center in Helmand province, said deputy provincial police chief Faqir Askeryar. Four civilians were among the dead, said district chief Mehbob Khan. The seven wounded included policemen and civilians, the Associated Press reported.