"Yesterday's serious events in Brasilia prove that the so-called 'patriotic' camps have become incubators for terrorists," tweeted Flavio Dino, the incoming minister.Supporters of President Jair Bolsonaro have been camped outside army bases in Brazil for weeks, urging the military to overturn the victory of leftist President-elect Luiz Inacio Lula da Silva, who takes office on Jan. 1.News of the bomb added a new dimension to post-election violence in Brazil, where tensions remain high after the most fraught election in a generation.Bolsonaro, who has yet to concede defeat, has made baseless claims about the credibility of Brazil's voting system, and many of his hardcore supporters believe him.Robson Cândido, head of the Civil Police in Brasilia, said a 54-year-old man from the northeastern state of Para had been arrested and confessed to planting the device in a fuel truck near the Brasilia airport in order to sow chaos."