The police on Friday confirmed that its officials disabled three unexploded improvised explosive devices, IEDs, at the scene of the May 1 explosion in Nyanya, Abuja.
The explosion caused the death of at least 19 people while about 60 others were injured.
While addressing journalists on Friday at a news conference in Nyanya, the scene of the incident, the police spokesperson, Frank Mba, said the IEDs had been rendered safe.
The spokesperson of the Department of State Security, SSS, Marilyn Ogar, and an official of the National Emergency Management Agency, NEMA, attended the briefing.
Mr. Mba said that six others apart from the 60 injured had been treated and discharged.
"Investigations are ongoing and we appeal to the citizens to rally round the security forces at this critical point in our history.
"It will take the unity of all of us to defeat terror," Mr. Mba said, and declined comment on whether any arrest had been made.
"I will not speak at this stage on ongoing investigations but investigations are ongoing and we will give facts when it is right to do so."
Also, Ms. Ogar said the cooperation of all Nigerians is required to win the war against terrorism.
"We must take our security into our hands because the security agencies cannot do it all alone, it must be collective.
"The call here is for all Nigerians to rally round security agencies; it is not a time to say they are not doing what they are supposed to do.
"The number of security personnel in the country is very small compared to the population, rally round us through information, no information is useless," Ms. Ogar appealed.