He made the disclosure at a joint news conference by the National Information Centre, Abuja.
He said the suspect was already providing the lead for subsequent aspects of investigation into the incident.
According to him, security agencies are carrying out nationwide surveillance and that the surveillance is yielding positive results.
Olukolade said “a number of persons, who are planning to continue the bombing spree, have also been arrested.
“But as a mark of vigilance of the security agencies, as well as the citizens who are giving useful information, the bomb planners were apprehended.
“Troops have continued to raid locations and in the course of which, a number of arrests have been made in places like Kachia in Kaduna State and Zamfara”.
The defence information director said arms and ammunition were recovered from the suspects, adding that the raid would continue so as to check violence in the country. (NAN)