MAIDUGURI, Nigeria - Five female suicide bombers killed 12 people and wounded 11 in northeast Nigeria's Borno state, police said on Monday.Borno state police spokesman Victor Isuku said the attacks took place on Sunday at around 08:30 p.m. (1930 GMT) in Kofa community, around 8 km (5 miles) from the state capital Maiduguri.Islamist militant group Boko Haram killed 14 people in bombings and shootings in Maiduguri on June 7.