Bob Geldof has spoken about the plight of the Nigerian schoolgirls taken hostage by terrorists.
Speaking publicly for the first time since the death of his daughter Peaches, Sir Bob told Channel 5 news that he hoped the girls could be returned to their parents.
But he said a celebrity campaign currently flooding social media with posts using the hashtag: #BringBackOurGirls, was unlikely to help.
Michelle Obama, Angelina Jolie, Malala Yousafzai and Hillary Clinton are among those lending their support to the social media campaign, which encourages military intervention to recover the girls who were kidnapped from their school by Boko Haram rebels in north-east Nigeria.
The Live Aid campaigner said: "The problem with media like this, is that everyone wants to do something, but sometimes you just can't. There is a great feeling of frustration.
"The US, the UK and several EU states, the Russians - they know about counter terrorism.
"If there is someone out there who could help – maybe some sort of technological bounty I don't know - but it will not stop the problem, it may find the girls and hopefully they are alive and could be reunited with their parents, but it won't stop the problem."