Deadly terrorists group, Boko Haram, says it is responsible for the attack on Thursday at the secretariat of Borno State in Maiduguri.
The bombing claimed not less than two policemen and left several other people injured.
Boko Haram, in a statement issued after the attack using the name Islamic State West Africa Province, ISWAP, disclosed that the action was carried out by Abu Anas al-Ansari.
It claimed “at least 15 apostates (non-believers)” were killed in the attack.
However, Nigerian Army spokesman, Sani Usman, said only two died and said the attacker blew up as security personnel stopped him from trying to get into the government offices.
“Unfortunately in the process of stopping him, he detonated the improvised explosive device on his body, instantly killing himself, a policeman and critically injuring another policeman…
“Sadly, the injured policeman died later,” Usman said.