Suspected Islamist insurgents kidnapped 50 people, mostly women, in northeastern Nigeria this week, local officials and a resident said, the latest mass abduction by fighters who have waged an insurgency for more than a decade. Boko Haram and Islamic State West Africa Province (ISWAP) fighters have mainly operated in Borno state in the northeast, targeting security forces and civilians, in the process killing and displacing tens of thousands of people. Advertisement · Scroll to continue The latest incident took place on Monday in the remote Gamboru area, which shares a border with Chad and Cameroon, said an official of the…