A suicide bomber on a three-wheeled vehicle detonated his bomb near the office of state security in Nigeria's northeastern city of Maiduguri on Saturday, two security sources said.
The city is the birthplace of the militant group of Boko Haram, which has long crippled the country’s security and is affiliated with ISIS. Maiduguri is frequently hit by bombings.
The blast went off a few metres from the office at about 7 a.m. local time (0600 GMT).
Only one person was killed in addition to the bomber, while a hospital source said four people were being treated for injuries.
Since the appointment of Muhammadu Buhari to the Nigerian presidency in May, the frequency of the bombings increased.Buhari vowed to face the armed insurgency, since his predecessor Goodluck Jonathan has been accused of failing to contain the ramifications of Boko Haram.
Nigeria, the most populous country in Africa, is considered one of the biggest economies in the continent. Buhari is in the command centre for the joint military campaign against the militant group after being inaugurated on May 29.