The former Brazilian president Jair Bolsonaro and some of his closest allies are among dozens of people formally accused by federal police of being part of a criminal conspiracy designed to obliterate Brazil’s democratic system through a rightwing coup d’état.

Federal police confirmed on Thursday that investigators had concluded their long-running investigation into what they called a coordinated attempt to “violently dismantle the constitutional state”.

In a statement, police said the report – which has been forwarded to the supreme court – formally accused a total of 37 people of crimes including involvement in an attempted coup, the formation of a criminal organization, and trying to tear down one of the world’s largest democracies.

The accused include Bolsonaro, a disgraced army captain turned populist politician, who was president from 2018 until the end of 2022, as well as some of the most important members of his far-right administration.

They included Bolsonaro’s former spy chief, the far-right congressman Alexandre Ramagem; the former defense ministers Gen Walter Braga Netto and Gen Paulo Sérgio Nogueira de Oliveira; the former minister of justice and public security Anderson Torres; the former minister of institutional security Gen Augusto Heleno; the former navy commander Adm Almir Garnier Santos; the president of Bolsonaro’s political party, Valdemar Costa Neto; and Filipe Martins, one of Bolsonaro’s top foreign policy advisers.

Also named is the rightwing blogger grandson of Gen João Baptista Figueiredo, one of the military rulers who governed Brazil during its 1964-85 dictatorship.

The list contains one non-Brazilian name: that of Fernando Cerimedo, an Argentinian digital marketing guru who was in charge of communications for Argentina’s president, Javier Milei, during that country’s 2023 presidential campaign. Buenos Aires-based Cerimedo is close to Bolsonaro and his politician sons.

The long-awaited conclusion of the police investigation comes just days after federal police officers made five arrests as part of a roundup of alleged members of a plot to assassinate Bolsonaro’s leftwing successor Luiz Inácio Lula da Silva and his centre-right vice-president, Geraldo Alckmin, as well as the supreme court judge Alexandre de Moraes.

Shortly before police announced the end of their inquiry, Lula voiced gratitude that the attempt to poison him had failed. “I’m alive,” the 79-year-old leftist said during a speech.

Gen Mario Fernandes, one of the five people arrested over the alleged “Green and Yellow Dagger” assassination plan, was also among the 37 people named by federal police on Thursday – and like the others was formally accused of being part of a criminal coup attempt. “We are at war,” Fernandes allegedly said in one message discovered by police investigators.

Bolsonaro has previously denied involvement in an attempt to overturn the result of the 2022 election, which he lost to Lula. Speaking to a journalist from the Brazilian news site Metrópoles after he was named in the police report, the former president said he needed to see what was in the investigation. “I’m going to wait for the lawyer,” Bolsonaro added.

Braga Netto, Heleno and other prominent names on the list made no immediate comment about the accusations in the federal police report, which the police statement said was based on a large trove of evidence gathered through plea deals, searches and the analysis of financial, internet and phone records. But prominent pro-Bolsonaro politicians criticized the report, with Rogério Marinho, the leader of the opposition in the senate, attributing it to the “incessant persecution” targeting Brazil’s right. “The more they persecute Bolsonaro, the stronger he gets,” tweeted Sóstenes Cavalcante, a Bolsonarista congressman from Rio.

The alleged pro-Bolsonaro coup attempt allegedly played out during the turbulent final days of his four-year administration, which came to an end when he was narrowly defeated by Lula in the second round of the 2022 presidential election.

In the lead-up to that crunch vote, a manifesto signed by almost a million citizens warned that Brazilian democracy was facing a moment of “immense danger to democratic normality” amid widespread suspicion that plans were afoot to help Bolsonaro cling to power even if he lost.

After losing his re-election bid, Bolsonaro flew into temporary exile in the US while thousands of supporters gathered outside military bases around Brazil to demand a military intervention that never came.

The failed attempt to overturn Lula’s victory culminated in the 8 January 2023 riots in the capital, Brasília, when radicalized Bolsonaristas rampaged through the presidential palace, congress and supreme court.

Nearly two years later, Lula is in power but the far-right threat to his administration remains. Last Wednesday night, a member of Bolsonaro’s political party was killed after apparently blowing himself up with homemade explosives while attacking the supreme court.

During a search of the man’s trailer, police reportedly found a cap emblazoned with the slogan of Bolsonaro’s far-right movement: “Brazil above everything. God above all.”

​In a video statement, Paulo Pimenta, Lula’s communications minister, said the government was “utterly perplexed and outraged” by the revelations that the former president and members of the military had allegedly been plotting to bring down Brazil’s democracy “with almost unbelievable audacity”.

“These are very grave crimes [and] very serious accusations,” added Pimenta, who said Lula’s administration would now wait for the public prosecutor’s office to decide which of the 37 would be prosecuted and put on trial. Those convicted would have to pay for the crimes they had committed against democracy, against the constitution and against the Brazilian people, said Pimenta. “Bolsonaro in Jail”, the minister wrote alongside his video, echoing a call from many progressive Brazilians.