A Chinese-led BRICS naval exercise in Cape Town has turned into a diplomatic setback for South Africa after Iranian warships joined the manoeuvres, reported Fort Lauderdale's Maritime Executive.

Three Iranian vessels, including the corvette IRINS Naghdi and two converted oil tankers, arrived in False Bay to take part alongside ships from Russia, China and the UAE. Iranian personnel joined parades and sports events before the sea phase began.

South Africa asked Iran to withdraw from active participation and remain only as observers, a request Tehran accepted.

The move followed concerns over aligning with Iran, accused of killing thousands in anti-government riots, and fears that South Africa's trade benefits under the US African Growth and Opportunity Act could be jeopardised.

The controversy stems from a September visit to Tehran by General Rudzani Maphwanya, who invited Iran without approval from President Cyril Ramaphosa. Critics said the president's response was weak.

Observers are monitoring Simon's Town Naval Base for the Iranian vessels' departure, while uncertainty remains over the whereabouts of Iran's 104th Flotilla. Protests have also erupted near Bandar Abbas Naval Harbor.

The exercise, dubbed "Will for Peace 2026," aims to practise drills for protecting shipping lanes, including counter-terrorism and maritime strike operations. It is the first naval drill under BRICS, traditionally an economic bloc.