Singer Katy Perry, the most followed person on Twitter, has joined the list of celebrities demanding the safe return of 234 schoolgirls kidnapped in Nigeria by Boko Haram.
Perry told her 52.8 million followers the matter "needs serious attention".
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.