Boko Haram wing tied to IS marks resurgence by kidnapping oil workers

By Alexis AkwagyiramLAGOS (Reuters) - A Boko Haram faction with ties to Islamic State and responsible for the kidnapping of a Nigerian oil prospecting team which led to at least 37 people being killed has become a deadly force capable of carrying out highly-organised attacks.Nigerian government forces have focused on crushing the best-known branch of the Islamist militant group whose leader Abubakar Shekau has led an eight-year insurgency to create an Islamic state in the northeast which has kil