Gordon Brown called on Boko Haram to photograph pictures of all the schoolgirls they kidnapped four weeks ago to prove they are still alive.
The former Prime Minister tried to remain optimistic about the video which emerged yesterday showing approximately 100 of kidnapped schoolgirls as it meant "the majority of them are still alive", he told Good Morning Britain.
He also called "on every religious community to condemn Boko Haram and tell them that they cannot use girls in this way".
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.