A man killed himself with a bomb outside Brazil's Supreme Court after trying to enter the building on Wednesday, officials said, stirring security concerns before the country hosts global leaders from the Group of 20 major economies.

stirring security concerns shortly before the country hosts the G20 summit. The blasts come five days before global leaders from the Group of 20 major economies meet in Rio de Janeiro, followed by a state visit to Brasilia by Chinese President Xi Jinping.