Two train carriages were destroyed and a third one badly damaged in a fire at Cape Town station on Tuesday evening.
The fire was contained with no injuries having been reported.
Power had to be disconnected while firefighters were busy battling with the blaze.
Arson attacks have destroyed 184 carriages between 2015 and May this year.
Metrorail has incurred in excess R550 million in damages .
Metrorail has warned that rail services will be affected because of the fire.
Metrorail spokesperson, Riana Scott, says two platforms have been closed.
“Following the fire last night platforms 5 & 6 at the cape town station remain closed, and this is to give our technical teams at first light this morning just the opportunity to access whether there’s any structural damage, as soon as it’s declared safe we will reopen the platforms and inform our commuters, commuters must also bear in mind that with the re-assignment of alternative platforms the trains may be placed in a holding pattern outside Cape Town Station.”