The Public Protector's office is the latest institution to launch an investigation into South Africa's controversial R30-billion arms deal.

A spokesperson for the office said on Friday that at least four complaints had been received, and these were being investigated by Public Protector Selby Baqwa.

She did not rule out co-operation, at a later stage, with other agencies investigating the deal.

They include the auditor-general, the Heath anti-corruption unit and the Investigating Directorate: Serious Economic Offences.

Meanwhile, a spokesperson for the Heath unit said it had received more documentation relating to the arms deal's subcontracts.

The unit would be in position to say early next week whether it would apply for a presidential proclamation to formally investigate the deal.

Auditor-General Shauket Fakie, in his report to parliament tabled last week, found material deviations had occurred from generally accepted procurement practices with regard to the prime contracts.

He also recommended a special forensic audit into the subcontracts, which have been the subject of repeated corruption claims.

Parliament's watchdog committee will discuss the report on October 11, the same day Defence Minister Mosiuoa Lekota is expected to table it before cabinet.

Lekota's spokesperson, Sam Mkhwanazi, said it was good the deal was being scrutinised by so many bodies.

"Whatever findings they will come up with, then everyone will be happy." - Sapa

With acknowledgement to Sapa and Independent Online.