The Cameroon army claimed Wednesday to have dealt a major blow to Nigeria's Boko Haram Islamists, killing around 100 fighters and freeing 900 hostages in a three-day operation last week. ... The sweep enabled troops "to release almost 900 hostages, seize large supplies of arms and munitions as well as black-and-white Islamic State flags", the statement added, without providing details on the identities of those freed. Boko Haram swore allegiance to IS in March 2015. The minister attributed the success of the raid to cooperation between Cameroon security forces, a new multinational force being set up to fight Boko Haram...