The African county of Nigeria remains on edge after a wave of deadly bombings and attacks by gunmen this year.
In the city of Kaduna, police chief Bala Nasarawa said Monday that an attack occurred at the Kaduna State government house, but declined to give more details.
The attack came a week after bombs targeting two major military bases and a highway overpass in Kaduna wounded an unknown number of people.
The radical Islamic group Boko Haram is blamed for killing nearly 300 people, including more than 185 in attacks in the city of Kano, which remains on high alert.
CBN News Senior Reporter George Thomas is on assignment in Kano, Nigeria. Click play for his report.