A look at Meta's role in Brazil's runoff, where Lula da Silva alleges Meta restricts his content and a court ordered it not to interfere; Meta cites glitches (Augusta Saraiva/Bloomberg)

Brazilians are heading to the polls on Sunday for a closely fought presidential runoff election between incumbent left-winger Luiz Inácio Lula da Silva and right-wing senator Flávio Bolsonaro. According to The Guardian, nearly 159 million people are expected to vote. The election follows a first round on October 4 where Bolsonaro led with 47 percent of the vote to Lula's 45 percent.

The campaign has been characterized by high levels of polarization. On the eve of the election, tens of thousands of supporters gathered at Copacabana beach, where Lula campaigned with supporters wearing the red of his Workers Party. BBC News reports that Flávio Bolsonaro, the 45-year-old son of former president Jair Bolsonaro, campaigned on promises of tax and public spending cuts and a crackdown on organized crime.

Techmeme notes that Meta Platforms Inc. has emerged as a new factor in the closing stretch of the election, as Lula da Silva has alleged the company restricts his content. Meta has cited glitches regarding these claims.

Brief written by urgent.news from Techmeme, BBC News, New Straits Times, Free Malaysia Today, The Guardian — 5 reports on this story. Machine-written — may contain errors; check the original before relying on it.