Five West African countries have agreed to form an anti-terrorism force to jointly fight jihadist militants in the Sahel region.
Opposition parties in Chad Friday cried foul after President Idriss Deby postponed parliamentary elections by more than two years for "budgetary reasons."
Chad has closed its border with Libya and will deploy troops to prevent militant fighters from entering its territory, the government has announced.
Chad, the world's fourth-poorest country, has become the main sponsor of a French Ligue 1 football club.
Chad's former president Hissene Habre was found guilty and sentenced to life in prison for crimes against humanity, war crimes, torture and sexual slavery by a Senegalese court on Monday.
The number of children involved in suicide attacks in Nigeria, Cameroon and Chad has soared from four in 2014 to 44 in 2015, the UN Children's Fund (UNICEF) said in a report Tuesday.
In Nigeria alone, approximately 600 teachers have been killed since the start of the Boko Haram insurgency, according to UNICEF.