A group of Nigerian parents are excitedly waiting to be reunited with 21 schoolgirls kidnapped by Boko Haram 2 1/2 years ago.

Nigerian President Muhammadu Buhari is inviting the United Nations to help negotiations to swap the kidnapped schoolgirls from Chibok for detained leaders of the Boko Haram Islamic extremist group.

A local official says Nigeria's Islamic extremist Boko Haram group has seized Chibok, the northeast town from which the insurgents kidnapped nearly 300 schoolgirls in April.