Six suicide bombers attacked a USAID compound Friday in northern Afghanistan, killing at least four people and wounding several others. One attacker blew up a sports utility vehicle at about 3:30 a.m. at the compound's entrance, killing an Afghan man working there as a security guard, said Gen. Abdul Razaq Yaqoubi, chief of police in Kunduz province. Five other attackers stormed the building used by Development Alternatives Inc., a global consulting company that has a USAID contract to work on local governance and community development issues in the area. An Afghan policeman and two foreign workers one from Germany and the others from the Philippines were killed in the fighting, said Gen. Murad Ali Murad, a commander for the Afghan National Army. The bodies of five suicide attackers were recovered from two floors of the building.