Nigeria, Feb. 4 -- The Nigerian Army says the North-eastern troops of Operation HADIN KAI (OPHK), a joint task force, have destroyed three detention facilities of the Islamic State West Africa Province (ISWAP) deep inside Timbuktu Triangle, a broader part of Sambisa forest straddling Borno and Yobe states.

The Army said the operation also led to the escape of more than 70 captives.

The operations which lasted two weeks, according to a statement by the joint task force spokesperson, Sani Uba, marked a "significant advance into areas long considered beyond the reach of security forces."

Mr Uba said the operations also underscored the growing effectiveness and sustainability of ongoing counter-insurgency operations in the North-east.

The...