According to Vanguard newspaper, activists have reported finding one of the missing Chibok girls.
She is the first since they were abducted by Boko Haram militants two years ago.
The more than 200 girls were taken from their secondary school in north-east Nigeria by Boko Haram terrorists on April 14, 2014.
Activists said the recovered hostage is Amina Ali.
She was found by a vigilante group on Tuesday in the Sambisa Forest, close to the border with Cameroon, the activists said.