The US envoy to South Africa has accused the country of supplying weapons to Russia despite its professed neutrality in the war in Ukraine.
Ambassador Reuben Brigety told local media he was “confident” that a Russian ship was loaded with ammunition and weapons in Cape Town last December.
South Africa’s President Cyril Ramaphosa said his government was looking into the claims.
The country has maintained claims of neutrality in the invasion of Ukraine.
Mr Brigety said at a media briefing in Pretoria on Thursday that Washington had concerns about the country’s stated non-aligned stance on the conflict.
He referred to the docking of a cargo ship in the Simon’s Town naval base between 6 and 8 December last year which he was “confident” uploaded weapons and ammunition “as it made its way back to Russia”.
The presence of the ship, the Lady R, had seemed curious at the time and raised questions from some local politicians.
“The arming of the Russians is extremely serious, and we do not consider this issue to be resolved,” Mr Brigety said, in a damning accusation that seems to have caught South Africa’s officials off guard.
In the wake of the allegations, the South African government announced the establishment of an independent inquiry led by a retired judge, a spokesman for the president’s office said.
The US has been critical for months about South Africa’s continued cosy relationship with Russia.
It also expressed concerns about South Africa’s participation in military exercises with Russia and China during the anniversary of the invasion of Ukraine.
