A man killed himself while detonating explosives after trying to enter Brazil’s Supreme Court, authorities said Wednesday, in an attack on the political heart of the country that prompted the evacuation of court staff and legislators in the capital Brasilia.

Authorities in Brazil on Thursday were searching for the motive of a man who apparently tried to bomb the Supreme Court, killing himself in the process.While a motive has not yet been determined, the bombing immediately evoked memories of last year's attack on Congress,