The Economic and Organised Crime Office (EOCO) has seized the passport of Ibrahim Mahama, the brother of former president John Mahama, the Daily Guide has reported.
The passport was seized when Ibrahim made a second appearance before EOCO on Wednesday.
The businessman and CEO of Engineers and Planners is under investigation for allegedly issuing 44 dud cheques to the customs division of the Ghana Revenue Authority (GRA) as duties for heavy duty equipment he imported into the country.
The cheques, which were reportedly submitted last year when the equipment arrived at the Port of Tema, bounced when the GRA went to process them at the banks.
The value of the cheques totalled GHc10 million, according to the Daily Guide report.
Ibrahim was expected to head to the EOCO office in Accra for another round of probing into what ha been described as a fraud against the nation.
On Tuesday, he was grilled by EOCO officials for close to eight hours, according to several media reports.
Meanwhile, Dr Nyaho Nyaho Tamakloe, a leading member of the New Patriotic Party (NPP), has condemned EOCO's probe of Ibrahim, describing it as a witch-hunt.
In an interview with Accra-based Starr FM, Tamakloe said Ibrahim, who is his nephew, committed no wrong.
According to him, all businessmen issue post-dated cheques and that there was nothing wrong with Ibrahim doing that.