China, Russia and Iran began a week of joint naval exercises in South Africa's waters on Saturday in what the host country described as a BRICS Plus operation to "ensure the safety of shipping and maritime economic activities".

BRICS Plus is an expansion of a geopolitical bloc originally comprising Brazil, Russia, India, China and South Africa - and seen by members as a counterweight to U.S. and Western economic dominance - to include six other countries, Reuters reported. 

Though South Africa routinely carries out naval exercises with China and Russia, it comes at a time of heightened tensions between U.S. President Donald Trump's administration and several BRICS Plus countries, including China, Iran, South Africa and Brazil.