Public Protector Busisiwe Mkhwebane is expected to probe alleged mismanagement by Metrorail in the Western Cape, after complaints were highlighted by the provincial legislature's standing committee on transport and public works.

Committee chairperson Nceba Hinana last week wrote a letter to Mkhwebane, in which he raised concerns about inadequate infrastructure, safety, delays and cancellations.

This followed a series of attacks on trains, with at least three recent train torchings and one botched attempt recorded.

In July, 32 coaches were damaged as a result of arson. The damage caused to trains and infrastructure came to more than R50-million.

Only one arrest has been made in connection to the suspected sabotage, when a 24-year-old man was caught as he attempted to flee, after allegedly trying to start a fire on a stationary train in Cape Town station.

The motive behind the attacks remain unclear.

Hinana said in his letter that unreliable train services put extra pressure on bus services, private taxis and an "embattled" minibus taxi sector.

"Metrorail’s reliability is intensifying traffic, as individuals are increasingly using their own transportation," he said.

The Public Protector's office responded to the letter on Thursday, in which Oupa Segalwe noted the request for an investigation.

"Your complaint will be allocated to the Western Cape office. The provincial representative will assign the case to a senior investigator for investigation," Segalwe stated.

Hinana welcomed the swift response and called for the investigation to be given priority.

Metrorail could not be immediately reached for comment. Its response will be added once received.