The Nigerian army says it has retaken the north-eastern town of Gwoza, believed to be the headquarters of Islamist militant group Boko Haram.
The authorities in Sierra Leone are enforcing a three-day national lockdown to curb the spread of Ebola, except for short windows to pray.
Nigeria's two main presidential candidates sign an agreement to prevent violence in tightly contested elections due on Saturday.
And nine other great things about Nigeria
The country where a watermelon costs 100 times more than a beer
Will bribes and rice determine Nigeria's next leader?
The Christians bussing out in case Nigeria poll turns violent
Statue is symbolic target at South African university
Has Ebola focus led to other killer diseases being ignored?
A Liberian woman tells the BBC's Andrew Harding how her husband left her even though she survived Ebola.