This article is from the source 'bbc' and was first published or seen on . It last changed over 40 days ago and won't be checked again for changes.

You can find the current article at its original source at http://www.bbc.co.uk/news/world-africa-27344863

The article has changed 7 times. There is an RSS feed of changes available.

Version 0 Version 1
Nigeria abductions: Warnings of school raid 'ignored' Nigeria abductions: Warnings of school raid 'ignored'
(35 minutes later)
Nigeria's military had advance warning of the attack on a school at which some 270 girls were kidnapped but failed to act, a rights group says.Nigeria's military had advance warning of the attack on a school at which some 270 girls were kidnapped but failed to act, a rights group says.
Several credible sources have told Amnesty International that the military in the state capital, Maiduguri, had more than fours hours' warning. Amnesty International says it was told by several credible sources that the military was given more than fours hours' warning of the raid.
Fifty-three of the girls have escaped, leaving more than 200 still captive. Fifty-three of the girls escaped shortly after being seized on 14 April, leaving more than 200 still captive.
The authorities have not yet commented on Amnesty's statement.
Teams of experts from the US and UK have arrived in Nigeria to help locate and rescue the abductees.Teams of experts from the US and UK have arrived in Nigeria to help locate and rescue the abductees.
Amnesty says that despite the warning, reinforcements were not sent to help protect the school in the remote Chibok area.
It says one reason was a "reported fear of engaging with the often better-equipped armed groups".
It is believed the schoolgirls are being held somewhere in the vast forested areas that stretch from near Chibok into neighbouring Cameroon.
The group says the small security force was overpowered by the attackers.
Militant Islamist group Boko Haram has said it captured the girls, saying they should not have been in school and should get married instead.
Boko Haram, whose name means "Western education is forbidden" in the Hausa language, began its insurgency in Borno state in 2009.
At least 1,200 people are estimated to have died in the violence this year alone.
In a video released earlier this week, Boko Haram leader Abubakar Shekau threatened to "sell" the students.