Bolsonaro has been taken into custody after authorities concluded he posed a concrete flight risk while under home confinement.
The one-time leader was found guilty of plotting a military coup in September and given more than 27 years in incarceration, but he was staying under home detention pending appeals.
Brazilian Supreme Court Justice the presiding justice said the move to detain the 70-year-old politician was a preventative measure after "new facts" were revealed.
This involved attempting to break his ankle monitor and a invitation to a supporters' gathering that could facilitate a chance to flee".
Legal Document Reveals Flight Fears
In a document approving the detention, Justice Moraes said intelligence from the facility tracking Bolsonaro's house arrest suggested the ex-president's "intention to break the tracking monitor to guarantee victory in his flight.
This, it said, would be made easier by the chaos caused by the demonstration called by his child.
His son, Flávio Bolsonaro, who serves as a legislator, called for a assembly of his followers near his father's house to take place on Saturday night.
His son wrote on social media on the previous day: Will you battle for your nation, or watch it all from your mobile device there on your couch? I call on you to battle with us."
He said the demonstration would be so backers could "pray for his health and for the return of democracy in our country."
Diplomatic Refuge Fears
Part of the magistrate's ruling was the potential of the former president's "relocation to embassies near the home, considering that the inquiries revealed a record of arranging to request asylum through a consular facility", a declaration said.
The judicial paperwork highlights that the United States embassy in the national capital, the capital city, is located around 8 miles from Bolsonaro's home.
Worldwide Consequences
His judicial problems have provoked anger from fellow populist conservative United States President Donald Trump, prompting him to enact a half-rate duty on imports of Brazilian goods.
He is being kept in a Federal Police station in the capital and will have a custody hearing on Sunday.
Latest Court Petitions
It was only on Friday that the former president's lawyers asked the High Court to authorize him to complete his entire prison term under house arrest, with digital surveillance.
They also requested that he be permitted to exit his dwelling for healthcare, saying he demanded frequent medical attention for lung conditions and other health problems.
Background on Conviction
The former president was found guilty of orchestrating a scheme aimed at maintaining his control after he lost the presidential race to his political opponent, President Lula.
Supreme Court justices said that he had knowledge of a plot which involved plans to assassinate Lula and his running partner, Alckmin, and to arrest and execute Alexandre de Moraes - the Supreme Court justice who has been managing the former president's case.
The scheme was stopped because it didn't receive the backing of the army and air force commanders. His successor was took office without issue on the first day of 2023.
But a seven days after, on 8 January, numerous his backers invaded and destroyed public facilities in the capital, Brasília.
The law enforcement stepped in and around 1,500 people were arrested.
The judges found that the demonstrators had been provoked by the former president whose plan, they said, was for the Brazilian military to intervene, reestablish control and reinstate his authority.
At the time, his attorneys called the decades-long sentence unreasonably severe".
He was also barred from campaigning for office until twenty-sixty - a decade minus two years after the completion of his term.
The ex-leader called the court case a political persecution and said it was aimed at blocking him participating in the 2026 presidential election.
