Brazil’s Supreme Court on Monday upheld the detention of former president Jair Bolsonaro, who was taken into custody over the weekend after authorities said he damaged his ankle monitor with a soldering iron.

Bolsonaro was arrested on Saturday at his home, where he had been serving house arrest after a judge ruled he was a flight risk while appealing a 27-year sentence for plotting a failed coup aimed at stopping President Luiz Inacio Lula da Silva from taking office after the 2022 election. The conviction, handed down in September, included allegations of an assassination plot against the incoming president.

Justice Alexandre de Moraes said Bolsonaro “willfully and consciously violated the electronic monitoring equipment.” Three other justices in the court’s first chamber agreed, making the decision final at the close of a virtual session on Monday night.

Moraes also cited “very serious indications of a possible attempt to flee,” referring to a vigil planned outside Bolsonaro’s home by his son, the proximity of the US embassy, and Bolsonaro’s close relationship with former US president Donald Trump.

During a Sunday hearing in Brasilia, Bolsonaro told the court he had been “experiencing a certain paranoia between Friday and Saturday due to medication,” insisting he had not tried to flee and denying he broke the strap of the monitor.

In a separate video released by the court, Bolsonaro said he had used a soldering iron on the device out of “curiosity.” The footage showed the monitor burned and damaged but still attached to his ankle.

His lawyers have asked that he be returned to “humanitarian house arrest,” saying he is in a “state of mental confusion” linked to medication. The court has already rejected one appeal of his sentence, and his legal team has until midnight Monday to file another challenge.