Boko Haram seized 276 pupils from the Government Girls Secondary School in Chibok on April 14, 2014. Fifty-seven managed to escape in the immediate aftermath of the abduction, but nearly 200 other girls are still missing.
Habiba Balogun, a Bring Back Our Girls campaigner, said she was relieved to hear about Thursday’s release, but added that a lot more work still needed to be done.
“You can’t be happy, because they released 21 and there are still 197 girls there, on the one hand,” she told Al Jazeera.
“On the other hand, we’re relieved that – my God, at last – some girls have been released.”
The deal for the release of the girls was brokered by the Swiss government and the International Committee of the Red Cross.
Al Jazeera’s Ahmed Idris, reporting from the northern city of Kano, said negotiations between the Nigerian government and Boko Haram had been taking place for some time.
He added, however, that “many Nigerians believe their government will have to give Boko Haram fighters something in return for the release of the rest of the girls. Nonetheless, this is a good day for the families of the girls who’ve been freed”.
Information Minister Lai Mohammed described the freeing of the 21 as “a credible first step in the eventual release” of all the schoolgirls in captivity.
“It is also a major step in confidence-building between us as a government and the Boko Haram leadership on the issue of the Chibok girls,” he told reporters on Thursday.
Major political issue
On Friday, Nigerian President Muhammadu Buhari said Nigeria would continue working to free the remaining girls kidnapped by Boko Haram.
“About 100 more [girls] are still in the hands of the terrorists. We hope we’ll get some … intelligence to go about securing the balance,” he said.
Buhari said Nigeria was grateful for the help of the United Nations for its help in trying to free the girls, but that Nigeria still faced massive consequences from the group’s power and influences, including up to two million people internally displaced people, including many children.
In August, Buhari told journalists he would be open to swapping Boko Haram fighters for the abducted girls.
In 2015, the government was said to have been close to securing the release of the girls through a swap but officials said negotiations between government and the armed group collapsed three times.
“Expectations were high. Unfortunately, after more than two weeks of negotiation and bargains, the group, just at the dying moments, issued a new set of demands never bargained for or discussed by the group before the movement to Maiduguri,” Mohammed, the information minister, said.
“All this while, the security agencies waited patiently. This development stalled what would have been the first release process of the Chibok girls.”
The kidnapping has become a major political issue in Nigeria, with the government and military criticised for their handling of the incident and their failure to rescue the girls.
About 2,000 girls and boys have been abducted by Boko Haram since 2014, with many used as sex slaves, fighters and even suicide bombers, according to Amnesty International.
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