Scared but alive: Video purports to show abducted Nigerian girls (CNN) -- The girls sit quietly on the ground, dressed in traditional Islamic garb, barely moving, clearly scared. "Praise be to Allah, the lord of the world," they chant. The video, released by French news agency Agence France-Presse, purports to show about 100 of the 276 girls kidnapped by Boko Haram fighters nearly a month ago. It's the first time they've been seen since their abduction April 14. In separate shots included in the 27-minute video, a man says he will release the girls only after imprisoned members of Boko Haram are freed, according to AFP. Watch this video Escaped girl recalls kidnapping ordeal Watch this video Nigerian father: Nothing has been done Watch this video First lady: Kidnappings 'unconscionable' People march in Lagos, Nigeria, on Monday, May 12, to demand the release of schoolgirls kidnapped from Chibok last month. The abduction of nearly 300 female students who remain captives of the Islamist militant group Boko Haram has attracted mounting national and international outrage. Catholic faithful take Holy Communion and pray for the safety of the kidnapped schoolgirls in a morning Mass in their honor in Abuja, Nigeria's capital, on Sunday, May 11. Catholic faithful attend a morning Mass in honor of the kidnapped Chibok schoolgirls, in Abuja, Nigeria, on May 11. Catholics nuns pray during a morning Mass in honor of the kidnapped Chibok schoolgirls, in Abuja, Nigeria, on May 11. A woman attends a demonstration Tuesday, May 6, that called for the Nigerian government to rescue nearly 300 schoolgirls who were kidnapped last month in Chibok, Nigeria. The girls were taken by the Islamist militant group Boko Haram. Abuja Hosea Sambido, a leader in the Chibok community, speaks during a rally in Abuja, Nigeria, on May 6, pressing for the release of the abducted girls. Brig. Gen. Chris Olukolade, Nigeria's top military spokesman, speaks to people at a demonstration on May 6. Women march Monday, May 5, in Chibok. People rally in Lagos, Nigeria, on Thursday, May 1. Police stand guard during a demonstration in Lagos on May 1. Protesters take part in a "million woman march" on Wednesday, April 30, in Abuja. Obiageli Ezekwesili, former Nigerian education minister and vice president of the World Bank's Africa division, leads a march of women in Abuja on April 30. A woman cries out during a demonstration Tuesday, April 29, in Abuja with other mothers whose daughters have been kidnapped. A man weeps as he joins parents of the kidnapped girls during a meeting with the Borno state governor in Chibok on Tuesday, April 22. Mothers weep during a meeting with the Borno state governor on April 22 in Chibok. Four female students who were abducted by gunmen and reunited with their families walk in Chibok on Monday, April 21. Borno state governor Kashim Shettima, center, visits the Chibok school on April 21. Photos: Nigerians protest over kidnapped girls Photos: Nigerians protest over kidnapped girls The man identifies himself as Boko Haram leader Abubakar Shekau. Nigerian officials disputed that claim on Monday, arguing that Shekau is dead. Other experts say the notorious terror group leader is still alive. Whoever the man in the video is, Nigeria's interior minister said, the country isn't interested in negotiating a swap anyway, according to AFP. But at a later briefing, the director of the National Orientation Agency, a government information ministry, said negotiations could be an option when it comes to rescuing the kidnapped girls. When asked whether all options were on the table, agency Director Mike Omeri said yes. "The government of Nigeria will continue to explore all options for the release and safe return of our girls back to their respective homes," Omeri told CNN. The road to Boko Haram's heartland Experts reviewing video If authentic, the video released Monday is the first glimpse of the girls since Boko Haram fighters snatched them from a boarding school in the northern Nigerian town of Chibok. A senior administration official told CNN that U.S. officials have no reason to question its authenticity. "Our intelligence experts are combing over every detail of the video for clues that might help in the ongoing efforts (to) secure the release of the girls," the official said. The abductions have resulted in worldwide outrage directed at the terror group and an influx of Western counterterrorism and law enforcement experts to help Nigeria fight it.

• published: 14 May 2014
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