Niamey - A bomb exploded in Niger's bordertown of Diffa hours after extremist group, Boko Haram attacked a prison there, a military and a local source said.
"A violent explosion was heard in Diffa. I have been informed that it was a car bomb," said a military source in Diffa, reached by telephone.
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A third source, familiar with the situation, said a number of people were injured by the blast, which was followed by shooting in the town. Further details could not immediately be confirmed.