Malami and Monguno are members of the panel which President Muhammadu Buhari set up to probe the monies the EFCC recovered from an apartment in Lagos.
The panel was given two weeks to submit its report.
Last week, the commission found $43.4 million, N23 million and £27,000 in an apartment in Osborne Towers, Ikoyi, Lagos.
Ayo Oke, director general of the National Intelligence Academy (NIA), had said the money belong to his agency.
On Wednesday, Buhari suspended Oke alongside Babachir Lawal, secretary to the government of the federation (SGF).
At the end of Thursday’s meeting which took place inside Osinbajo’s office, the security chiefs refused to speak with state house correspondents.
It was only Magu who spoke briefly. He said the meeting was about assets recovery.
Jibrilla Bindow, governor of Adamawa, where Lawal hails from, was also at the villa on Thursday.