The first of more than 200 schoolgirls missing for over two years after they were kidnapped by Boko Haram militants in Chibok in northeast Nigeria has been found, a parents group and local officials said.

Boko Haram extremists have killed more than 100 people in Nigeria, according to a civil defence spokesman.

At least 50 alleged insurgents were killed during clashes with Nigerian soldiers as security forces repelled an attack on a military base in the north-eastern state of Borno.