Mr Gumi, an advocate for bandits, said Mr Tinubu deceived northerners with a Muslim-Muslim ticket to win the February 25 election.
“The INEC has failed the nation by sowing more distrust and suspicion because it failed to follow its own guidelines in conducting last week’s elections.”
The SSS said its “investigation has assumed a wider dimension and sophistication requiring time and advanced expertise to conclude.”
Tukur Mamu had been leading negotiations with bandits for the release of the Abuja-Kaduna train passengers kidnaped in March.
Mr Gumi wants a fraction of Nigeria’s yearly military budgets spent on the bandits.
