Spokesperson Lillian Mofokeng said the driver identified as JP Du Plessis was found dead on Tuesday, with several stab wounds in a static train.
"The cause of this incident is not yet clear and will be fully investigated with immediate effect," said spokesperson Lillian Mofokeng. Metrorail Gauteng provincial manager Tembela Kulu said train services would be suspended in Gauteng on New Year's Day in honour of Du Plessis.
She said as a preventative measure, all trains would operate until 18:00 in Gauteng for the festive season until 4 January.