The board of Passenger Rail Agency of South Africa (Prasa) announced on Wednesday that it has either suspended or placed on special leave three senior executives amid ongoing investigations.
In a statement Prasa said that its chief strategy officer Dr Sipho Sithole had been placed on suspension. Its head of legal, risk and compliance Martha Ngoye, and Tiro Holele - an executive in the office of the group CEO - have been placed on special leave.
"This decision follows the outcomes and ongoing investigations that have dogged Prasa of improper, irregular, corrupt, fruitless and wasteful expenditure by various employees of Prasa at all levels of the organisation," said the group.
"The suspension and placement on special leave of these executives, is to ensure a fair process based on a principle of innocent until proven guilty."
The passenger rail agency has already placed a number of senior staff members on special leave or suspension this year as its board seeks to get to the bottom of allegations of corruption and wasteful expenditure.
In March, it placed company secretary Lindikaya Zide, chief information officer Chris Mbatha and CEO of Prasa corporate real estate solutions Tara Ngubane on special leave, while it suspended Matome Mohube, its general manager of enterprise risk. In late April it axed Mohube.