A summit of leaders from the BRICS group of major emerging economies kicks off in Brazil Sunday – but without the top leader of its most powerful member.

Chinese President Xi Jinping's absence from public view, appearing only twice in videos in over a month, amid a military purge and economic challenges, has fuelled speculation of a power shift in the Chinese Communist Party.

The 17th Brics summit has begun in Brazil’s Rio de Janeiro and leaders, including Prime Minister Modi and South Africa’s Cyril Ramaphosa are in attendance. However, for the first time since taking power in 2012,