Johannesburg EMS spokesperson Robert Mulaudzi said firefighters had responded to the incident at around 10:00 on Monday morning.
Mulaudzi said the buses had been "completely destroyed".
No injuries were reported.
He said the cause of the fires was still being investigated.
Earlier on Monday morning, at least three buses were also set alight in Khayelitsha in the Western Cape. DM
File Photo: The station the Grand Parade, Cape Town, during the bus strike 19 April 2018. Photo by Leila Dougan