Vieira told the opening ceremony, also attended by other government ministers and First Lady Rosângela da Silva, that the gathering is part of Brazil’s G20 agenda to promote sustainable development and green energy, fight poverty and reduce inequality.

A man killed by explosions outside of Brazil's Supreme Court in Brasilia on Wednesday night is suspected to have been trying to launch an attack, a presidential official said, as authorities investigate the incident just days ahead of the G20 meeting in Rio de Janeiro.

Police have identified the man who killed himself in a blast outside Brazil's Supreme Court on Wednesday night as a former city council candidate from ex-President Jair Bolsonaro's right-wing party with a history of heated political rhetoric online.