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.

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.

Federal police inspects the ground after a suspect in a bomb attack killed himself outside the Brazilian Supreme Court building the morning after explosions in the Three Powers Square in Brasilia, Brazil November 14,