It’s unclear why they were detained or what they were accused of.
The employees were held without being charged and Sun International says it managed to secure their release with the help of the South African High Commission in Nigeria.
The hotel group also appealed to the Nigerian Economic and Financial Crimes Commission for assistance.
Sun International spokesperson Michael Farr says the company is co-operating with Nigerian authorities.
“We’ve been asked to provide the Economic and Financial Crimes Commission with the history of our investment into the Tourist Company of Nigeria. They would also like to see trading records of the company and we’re very happy to do that.”
