Abuja: An explosion has rocked a hotel in the northern Nigerian city of Kaduna as voting in crucial Presidential Elections wrapped up, but it was unclear if there were casualties, police said.
"There was an explosion tonight at a hotel in the Kabala West area of the city," police spokesman Aminu Lawal said on Saturday. "We don`t know what caused the explosion yet or if it was a deliberate attack."
There was conflicting information on casualties, with a spokesman for the national emergency management agency saying there were initial unconfirmed reports of two people being caught up in the blast.
Vice President Namadi Sambo is from the state of Kaduna, where the city of the same name is located.
Two blasts had earlier gone off in the northeastern city of Maiduguri - one on Friday night and one Saturday morning - but no casualties were reported.
Voting on Saturday was generally calm in most of the country despite the blasts and a number of other incidents as Africa`s most populous nation sought to hold its cleanest polls for President in nearly two decades.