The Ethics and Anti-Corruption Commission (EACC) has summoned Jubilee Vice-Chair David Murathe and politician Cyrus Jirongo.
The reason for the summon is yet to be established.
Sources at the EACC, however, told Nairobi Leo that the two are linked to Sh200 million graft matter at City hall.
The two are expected to present themselves at the integrity centre.
Murathe and Jirongo were among the vocal leaders who drummed up support for Azimio leader Raila Odinga.
The group was a fierce critic of President William Ruto.
They however went under after the August 9, polls since they no longer appear in the media for interviews like before.
Reports have also linked the duo, together with Cotu boss Francis Atwoli, to the NSSf fund though Nairobi Leo could not independently verify the claims.