Kanu, who resurfaced in Israel at the weekend, threatened to unleash hell on Nigerians.
Briefing State House correspondents, Mohammed said:
“But before I knew it, within a few hours, I saw my picture with a story saying that I had actually given Israel ultimatum to return Nnamdi Kanu otherwise, we will send them missiles.
“I just laughed. It speaks to what we are talking about fake news because it is probably the biggest threat in the run-up to the elections.
“Having said that, I have nothing more to add to the issue of Nnamdi Kanu.”
He said the appropriate authorities in the country would speak on the issue at the appropriate time.
He said: “At the appropriate time, the various authorities will make a statement about the issue of Kanu.
“But this has proven that all along when Kanu disappeared and the mob was asking the Nigerian Army to account for the whereabouts of Kanu; I kept saying that Kanu knows where he is.
“He was not in the custody of the Federal Government. We have been vindicated today. Any other statement will be made in due course.”