The newspaper "Folha de São Paulo" erroneously published a report on the death of Queen Elizabeth II on its website on Monday.
It was an obituary prepared in the event of her death.
It read that the monarch had died "at the age of XX", "as a result of XXXXXXXX".
The message was removed from the site a little later.
Shortly thereafter, the newspaper said in a statement that it was a "technical error".
"It is standard practice in journalism to prepare stories about possible and/or probable situations, such as the deaths of world leaders, celebrities and public figures," the newspaper said, emphasizing its regret at the incident.
Founded in 1921, the newspaper “Folha de São Paulo” has the circulation of the country with a total circulation of more than 330,000 copies.
The online presence is likely to reach far more readers – the newspaper did not say how often the obituary was called up before it was taken offline.
According to the British newspaper Guardian, the glitch drew a number of different reactions.
Supporters of right-wing populist President Jair Bolsonaro, who regularly criticizes the newspaper, saw their “fake news” allegations confirmed.
Others were critical of the choice of image attached to the article: it showed the monarch laughing.
Still others took the blunder with humor and made jokes at the expense of the "folha".
Journalist David Biller, responsible for the AP news agency in Brazil, was more lenient on Twitter: "Every newspaper's nightmare: accidentally publishing an obituary.
And then of Queen Elizabeth.
Oof..."