A suicide bomber blew himself up in the town of Biu.
A suicide bomber blew himself up when humanitarian workers were given food affected by the local Islamists.
A suicide bomber has arranged explosion in the market in the town of Biu in northeast Nigeria, at least 12 people were killed.
Among the dead were eight men and four women. The explosion occurred at a time when humanitarian workers were given food to victims of the activities of the Nigerian Islamist group Boko Haram.
The number of victims reaches nearly 50 people.