"Amnesty: Vigilantes warned military of Boko Haram raid"

"The Nigerian government was warned
hours in advance that Boko Haram was
preparing a raid on Chibok, but failed
to prevent the kidnapping of more than
300 school girls last month, according
to a report released Friday by Amnesty
International..."
http://www.usatoday.com/story/news/world/2014/05/09/nigerian-military-warned-of-boko-haram-raid/8906317/