JUST IN : Explosions rock Maiduguri

In the northeastern Nigerian city of Maiduguri, a series of explosions were heard on Saturday, just hours before the opening of presidential and parliamentary polls.

At about 6:00 a.m. (0500 GMT), several blasts were heard, the locals told AFP.

There was no immediate indication of the cause, but Boko Haram Islamists attacked the city repeatedly.

Details later.