Jair Bolsonaro has been detained after authorities found he posed a definite escape threat while under domestic detention.
The ex-president was convicted of orchestrating a military coup in last fall and sentenced more than over two decades in incarceration, but he remained under house arrest pending appeals.
Top Judicial Official Alexandre de Moraes said the decision to arrest the elderly politician was a preventative measure after "new facts" emerged.
This included trying to remove his electronic bracelet and a call for a supporters' gathering that could "allow for a potential flight.
In a filing authorising the custody, Justice Moraes said intelligence from the centre monitoring his home detention suggested the former leader's aim to disable the tracking monitor to ensure success in his getaway".
This, it said, would be assisted by the chaos caused by the protest called by his child.
His son, Flávio, who holds office as a legislator, called for a meeting of his backers near the former president's residence to take place on Saturday night.
Flávio Bolsonaro wrote on digital networks on last Friday: Will you battle for your nation, or watch it all from your phone there on your settee? I invite you to struggle with us."
He said the vigil would be so supporters could "pray for his physical condition and for the restoration of democratic rule in our land."
Part of Justice Moraes's ruling was the possibility of his transfer to foreign missions near the home, considering that the investigations revealed a history of organizing to seek refuge through a consular facility", a announcement said.
The judicial paperwork underscores that the US embassy in the federal district, Brazil's capital, is situated around approximately 13 kilometers from his dwelling.
His judicial problems have generated frustration from fellow populist conservative US President President Trump, prompting him to enact a half-rate duty on Brazilian product imports.
Bolsonaro is being held in a federal law enforcement building in the capital and will have a detention review on Sunday.
It was only on Friday that the ex-leader's attorneys asked the High Court to allow him to serve his whole jail sentence under domestic detention, with digital surveillance.
They also requested that Bolsonaro be allowed to leave his home for healthcare, saying he required ongoing care for lung conditions and other ailments.
He was found guilty of orchestrating a plot aimed at keeping him in power after he lost the national vote to his ideological adversary, President Lula.
Supreme Court justices said that he had knowledge of a scheme which included plans to assassinate Lula and his vice-presidential running mate, his vice-presidential candidate, and to arrest and execute Alexandre de Moraes - the Supreme Court justice who has been managing his judicial proceedings.
The plot was thwarted because it couldn't obtain the endorsement of the army and air force commanders. His successor was sworn in without incident on January 1st, 2023.
But a week later, on the eighth of January, many his backers invaded and destroyed public facilities in the capital, the capital city.
The police intervened and around 1,500 people were arrested.
The magistrates found that the protesters had been provoked by the former president whose plan, they said, was for the Brazilian military to take action, reestablish control and return him to office.
At the period, the legal team called the decades-long sentence "absurdly excessive.
He was also banned from seeking elected position until twenty-sixty - eight years after the end of his sentence.
The ex-leader called the legal proceedings a political persecution and said it was aimed at blocking him running in the 2026 national vote.
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