The Archbishop of Canterbury Justin Welby has warned of the difficulties of negotiating with armed groups in Nigeria like Boko Haram.
The Most Reverend Welby worked in West Africa for several years in oil exploration and has first hand experience of trying to negotiate with "extraordinarily violent and very unpredictable" extremist groups.
He also that full-scale military involvement would bring about the "immense danger" of unifying disparate groups as many would see such an operation as an attack on Islam.
"What you are dealing with is a group of enormous violence, which even my Muslim friends in Nigeria are saying, is behaving in a way that the Muslim population finds terrifying and oppressive." Mr Welby said.
The Nigerian military has flown more than 300 sorties in the hunt for the abducted schoolgirls, a Major has told ITV News' Rageh Omaar.
A newly released video from Boko Haram reportedly shows the kidnapped Nigerian schoolgirls.
The man who started a viral hashtag campaign in support of the kidnapped Nigerian schoolgirls says it has forced the government to act.