Villagers in an area of Nigeria where Boko Haram operates have killed and detained scores of fighters who were suspected of planning a fresh attack, the residents and a security official said. Locals in Nigeria's northern states have been forming vigilante groups in various areas to resist the armed group which has held more than 270 schoolgirls captive since last month. In Kalabalge, a village about 250km from the Borno state capital of Maiduguri, residents said they were taking matters into their own hands because the Nigerian military was perceived as not doing enough to stem Boko Haram attacks. On...