Early morning explosions have rocked Borno and Yobe states a couple of hours to the opening of polling units for the general election.
A resident told TheCable that the explosions started a few minutes to 6am, with reports suggesting Maiduguri and parts of Yobe were affected.
Military helicopters are currently hovering over Maiduguri town.
According to NAN, the military repelled Boko Haram attackers who made an attempt to infiltrate Maiduguri and also stopped the insurgents at Geidam in Yobe.
The agency said many people fled their homes.
The attacks could have effect on the turnout of voters in the presidential and national assembly elections.
During the last general election, Boko Haram struck in parts of the north-east while people were heading to polling units.