Earlier four Sun International employees, three South Africans and one Nigerian, were held in relation to the investigation but the company had arranged their release.
“The EFCC still wishes to investigate the nature of Sun International’s original investment into TCN as well as TCN’s trading records and has requested that TCN provide them with information and documentation,” Sun said.
“Sun International has no difficulty with this request and intends to work with TCN to collate and provide the required information to the EFCC.”
A Sun spokesman said the group’s investment to date into TCN, which runs two hotels and a casino, was $50 million.
At present details of the investment and nature of the investigation are not known.