The unwilling girls may have been radicalised by Boko Haram or are ashamed to return home because they were forced to marry extremists and have babies, chairman Pogu Bitrus of the Chibok Development Association told The Associated Press in a telephone interview.
Bitrus said the 21 Chibok girls freed last week in the first negotiated release between Nigeria's government and Boko Haram should be educated abroad, because they will probably face stigma in Nigeria.
Some 276 schoolgirls were kidnapped from a school in northeastern Chibok in April 2014. Dozens escaped early on and at least half a dozen have died in captivity, according to the newly freed girls, Bitrus said.
All those who escaped on their own have left Chibok because, even though they were held only a few hours, they were labelled "Boko Haram wives" and taunted, he said. At least 20 of the girls are being educated in the United States.
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One Chibok girl, Amina Ali Nkeki, escaped in May. Chibok Parents' Association chairman Yakubu Nkeki said the young woman has been reunited with her freed classmates, all of whom are being treated by doctors, psychologists and trauma counsellors at a hospital in Abuja, Nigeria's capital, run by the Department of State Security, Nigeria's secret service.
The newly freed girls have told their parents they were separated into two groups early on in their captivity, when Boko Haram commanders gave them the choice of joining the extremists and embracing Islam, or becoming their slaves, Bitrus said.
The girls freed and those whose release is being negotiated, numbering 104, are believed to be in the group that rejected Islam and Boko Haram, he explained. The freed girls said they never saw the other girls again.
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