The US Department of Justice says reviewing the material could delay the full release of Epstein documents by a "few more weeks".
It is not clear if Asfura's opponents will accept the result after saying the vote count was manipulated.
Another 35 people were injured in the explosion during evening prayers in the city of Maiduguri, police say.
Preliminary investigations revealed the motive could be linked to illegal mining turf wars, police said.
Preliminary investigations revealed the motive could be linked to illegal mining turf wars, police said.
The US Department of Justice says reviewing the material could delay release by a "few more weeks".
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