Prime Minister David Cameron has promised Britain "will do what we can" to help find more than 200 kidnapped Nigerian schoolgirls.
He made the comments as he held a sign bearing the "#Bring Back Our Girls" slogan on the BBC's Andrew Marr show.
Mr Cameron is the latest high-profile supporter of the social media campaign after US First Lady Michelle Obama was pictured with a similar poster.
The Islamist militant group Boko Haram has claimed the abductions. READ MORE ON THIS STORY