Nigeria says it is making further gains against Boko Haram.
It comes after hundreds of women and children, kidnapped by the militants, were rescued.
The army is bearing down on what are believed to be Boko Haram’s final strongholds, in the Sambisa forest, in the northeast.
“The momentum of this operation will be sustained until that forest, that is Sambisa forest, is comprehensively cleared and all Nigerians held captive within it are rescued,” said Chris Olukolade, a Nigerian defence spokesman.
Boko Haram is said to have killed and kidnapped thousand of people since 2009.
It has pledged loyalty to ISIL, the militant group that has declared a “caliphate” to rule over Muslims, after seizing much of Syria and Iraq.