This is according to the UN which says that half the residents in the region are facing chronic food insecurity and malnutrition as violence continues to escalate.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/over-9-million-lake-chad-residents-urgent-need-food-aid-un
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/africa-news
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/food-security
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/malnutrition
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/food-aid
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/chad
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/nigeria
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cameroon
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/africa