GENEVA, Nov 30 (Reuters) – West Africa’s Boko Haram Islamist militant group is expanding and there is only a small window of opportunity to stop it, the top U.N. aid official in Cameroon said on Monday.

Source: http://feeds.reuters.com/~r/reuters/AfricaNigeriaNews/~3/r2_2iqLRZ4s/idAFL8N13P50S20151130