LAGOS, Nigeria (AP) — Residents fearfully left their homes Saturday to bury their dead in northeast Nigeria following a series of coordinated attacks that killed at least 67 people and left a new police headquarters in ruins, government offices burned and symbols of state power destroyed. A radical Muslim sect known locally as Boko Haram claimed responsibility for the attacks in Borno and Yobe states, with the worst damage done in and around the city of Damaturu. The group also promised to continue its bloody sectarian fight against Nigeria's weak central government, with residents nervously moving through empty streets, waiting...