Since they were kidnapped nearly two years ago from their school in Chibok, Nigeria, nothing has been heard or seen from the more than 200 girls since.

Until, perhaps, 25 March, when authorities in Cameroon detained a young woman who they say was carrying explosives near the border with Nigeria. The BBC reports that the girl said she was one of the kidnapped girls.

Cameroon has summoned two Nigerians — one the leader of a Chibok parents’ group, and the other the mother of one of the missing girls — to Cameroon verify the identity of the detained girl.