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.

Brazil's Supreme Court was evacuated after two nearby explosions on Wednesday night that left one dead in a square near Congress and the presidential palace, police said, stirring security concerns shortly before the country hosts the G20 summit.

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.