Read more:

- Islamist terror groups in Africa and Middle East

- 'Islamic State' seeks new foothold in Africa

- Nigeria: Fighting hunger and Boko Haram

Watch video 04:15 Share Hunger knocks on Nigeria's door Send Facebook google+ Whatsapp Tumblr linkedin stumble Digg reddit Newsvine Permalink https://p.dw.com/p/2m4QC Boko Haram conflict threatens food security in Nigeria

'We carried out these attacks'

On Tuesday, Boko Haram leader Abubakar Shekau released a video message claiming responsibility for a series of attacks across Nigeria's northeast over the Christmas period. People stand among the damage following the attack

The bomber hit the mosque in the town of Gamboru in Borno state, near Nigeria's border with Cameroon, during dawn prayers, said Ali Mustapha, an aid worker.
A suicide bomber attacks a mosque in Gamboru, Nigeria, killing 11 people.