Boko Haram leader Abubakar Shekau and other commanders of the Islamic extremist movement have been killed by an air strike, according to Nigeria's military.

A second girl believed to be among those kidnapped by Islamic extremists from a school in Nigeria has been rescued, the military said.

Three child suicide bombers have set off explosions in north-eastern Nigeria that killed six other people and left another 24 injured.

Extremists detonated three explosive devices in Maiduguri, the capital of Borno state, in Nigeria’s north-east.