Some of the Chibok schoolgirls kidnapped by Boko Haram nearly seven years ago have finally escaped their captors, a father of one of the girls told CNN.

Halima Ali Maiyanga, one of more than 100 young women still missing, called her father to say she and others had managed to flee Boko Haram militants Thursday.

“She asked me. Is this my daddy? Is that my daddy?” and she started crying. The crying was so loud that I couldn’t hear her well. I was crying, too. I never expected to hear from her again,” Ali Maiyanga said.

“The whole family is so happy. Our house is full of people who are happy with us.”

Ali Maiyanga said he didn’t get a chance to talk properly with his daughter because she was emotional and the call was brief. But he said she and others were safe and being cared for by the Nigerian army.

He added that she was calling from a phone belonging to a security official.

CNN has reached out to the Nigerian Army for official confirmation.

It is not yet clear how many of the remaining missing girls managed to escape.

Halima Maiyanga is the stepsister of Maryam Ali Maiyanga, who was rescued by troops along with a baby from a Boko Haram commander in 2016, according to Somiari Fubara, who was hired as a therapist in 2017 to care for the newly freed Chibok girls.

“They are very close. She often cried over her sister,” Fubara recalled of her time with them at the American University of Nigeria in Yola, Adamawa State.