He was subsequently rushed to EFCC's clinic where he was attended to by doctors.
The nature of the illness is still unknown at the moment, The Sun reports.
Sources said he'd just returned from a medical treatment abroad few days before appearing at EFCC.
He has since fulfilled his bail condition after the court had asked him to produce two directors in the civil service, one of who must own a landed property in the FCT to stand surety for him.
He was accused of a N1tr land fraud, among other charges.