Rescue groups say second Chibok kidnap victim found by Nigerian army was taken by Boko Haram after doubts were raised

• Nigerian military claimed they had rescued a second Chibok girl on Friday
• Campaigners say she had been captured separately from 219 held by Boko Haram
• Checks showed she was student at same school but was in different class
• The rescue came two days after Amina Ali, 19, and her baby were found

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