Nigeriens vote in a runoff to select a new president, in what is considered to be the nation's first potential peaceful transition of power since gaining independence in 1960. The two candidates are the ruling Nigerien Party for Democracy and Socialism's leader Mohamed Bazoum, and former president Mahamane Ousmane.
SEAL Team Six conducts a predawn raid in northern Nigeria, rescuing American hostage Philip Walton, who was kidnapped in Niger. The Pentagon says no U.S. military personnel were injured in the operation.
Boko Haram militants attack Chad for the first time after 30 fighters crossed Lake Chad in four motorboats and attacked the village of Ngouboua. Chad recently joined Nigeria, Niger, and Cameroon in a military coalition against Boko Haram.