One of the missing Chibok girls has been found in Nigeria, activists say – the first since they were taken by Boko Haram militants two years ago.

Some of the abducted Chibok girls

The 276 girls were taken from their secondary school in north-east Nigeria by the Islamist fighters in April 2014.

Activists confirmed to the BBC that Amina Ali was found by a vigilante group on Tuesday in the Sambisa Forest, close to the border with Cameroon.

She was reportedly identified by a civilian fighter.