Johannesburg - Canada and the United Nations are set to probe South Africa's role in busting sanctions against Iran, the Sunday Times reported.
The UN would "look into such reports", according to the paper.
Canada's Border Services Agency was also investigating, as Canadian company Eagle Copters was reportedly implicated.
According to a Sunday Times report last week South African front companies had been used to ship US helicopters and spare parts to Iran. Because some of these parts could be used for military purposes, they violated UN sanctions.
On Tuesday Public Protector Thuli Madonsela's spokeswoman Kgalalelo Masibi said the protector was assessing whether she had jurisdiction to probe the matter.
"She is not investigating, she is assessing the request," Masibi said.
This followed a request by Deputy President Kgalema Motlanthe to investigate the claims, which implicated his partner, Gugu Mtshali.
On Thursday, the National Conventional Arms Control Committee told Parliament's joint standing committee on defence that it had started investigations against the companies and individuals mentioned in the report.