Story highlights Nigeria's president will meet with the girls Sunday, his office says

The 82 girls were to be transferred to Abuja for medical checks

Lagos, Nigeria (CNN) Eighty-two Chibok schoolgirls have been released after negotiations between the terrorist group Boko Haram and the Nigerian government, the President's office said.

A government official close to the negotiations told CNN the freed girls are in military custody in the town of Banki in northeast Nigeria.

They will be transferred to the capital, Abuja, where they will have medical checks and be reunited with their families.

They are believed to be among the 276 girls, ages 16 to 18, forced from their beds by Boko Haram militants in the middle of the night in April 2014. The kidnapping from a boarding school in the town of Chibok sparked global outrage and the social media movement #BringBackOurGirls.

"I am very, very excited with this development. I cannot even sleep tonight," said Yana Galang, whose daughter, Rifkatu, was among the girls kidnapped.