SAO PAULO, Nov 4 (Reuters) - The Carter Center said on Friday that Brazil's presidential election was marked by a proliferation of sophisticated disinformation attacking the voting system and then questioning the impartiality of the national electoral authority.
The U.S.-based non-profit group, a pioneer of international election observation since the 1980s, said that both the winning leftist candidate Luiz Inacio Lula da Silva and far-right President Jair Bolsonaro were targets of disinformation.
In the second round of the election, the focus shifted to questioning the impartiality of the TSE, the Carter Center said.
In the final weeks of the campaign, the court decided to expand its ability to rapidly remove content from social media platforms, a move the Carter Center said "raised concerns about interference with fundamental rights."
Lula, a former president, narrowly won the run-off by 50.9% against 49.1% for Bolsonaro in Brazil's most divisive election in decades.