Lai Mohammed made the disclosure on Wednesday while addressing State House Correspondents after the weekly Federal Executive Council, FEC, meeting at the Presidential Villa, Abuja.
El-Zakzaky was arrested in December 2015 after members of his religious group had a clash with men of the Nigerian Army in Zaria, Kaduna State.
According to Mohammed, ”Please the issue of where El-Zakzaky is should be kept off the record. It cost the Federal government about N3.5 million every month to feed him, this is a fact.
“We don’t want to inflame passion because its a very sensitive matter but that is the situation. The Islamic Movement of Nigeria are a different kind of group.”