Former Brazilian President Luis Inácio Lula da Silva has said he will give himself up after a court order to begin a 12-year jail term for corruption.
He was speaking on a stage outside the union building near Sao Paulo where he has been staying during his stand-off with the legal authorities.
Two last-minute appeals to have his arrest warrant suspended have failed.
Dilma Rousseff, his impeached successor as president, joined him on the stage as thousands of supporters applauded.
“I will comply with their warrant,” Lula, 72, told the crowd in the suburb of Sao Bernardo do Campo, where he built his trade union and political career.
However, he continued to insist he was innocent, promising to come out of his legal troubles “bigger and stronger”. “I was born with a short neck so I can keep my head high,” he said.
When he left the stage, at the end of the 55-minute speech, he was carried on the shoulders of delighted supporters.
The crowd had gathered for a Mass to commemorate the former leader’s late wife, Marisa Leticia.
The former metalworker and trade union activist is an iconic figure for the left in Latin America. He was the first left-wing leader to make it to the Brazilian presidency in nearly half a century.
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What was Lula convicted of?
Lula says his conviction was designed to stop him from running for president in October’s poll, which he had been favourite to win.
In an order issued on Thursday, federal judge Sergio Moro said Lula had to present himself before 17:00 local time (20:00 GMT) on Friday at the federal police headquarters in the southern city of Curitiba.
The charges against Lula came from an anti-corruption investigation known as Operation Car Wash, which has embroiled top politicians from several parties.
He was convicted of receiving a renovated beachfront apartment worth some 3.7m reais ($1.1m, £790,000), as a bribe from engineering firm OAS.
The defence says Lula’s ownership of the apartment has never been proven and that his conviction rests largely on the word of the former chairman of OAS, himself convicted of corruption.
Who is Lula?
Lula served as president from 2003-2011. Despite a lead in opinion polls ahead of October’s election, he remains a divisive figure.
While he was in office, Brazil experienced its longest period of economic growth in three decades, allowing his administration to spend lavishly on social programmes.
Tens of millions of people were lifted out of poverty thanks to the initiatives taken by his government and he left office after two consecutive terms (the maximum allowed in Brazil) with record popularity ratings.
What happens next?
Supreme Court Justice Edson Fachin rejected Lula’s appeal on Saturday, a day after his appeal to the Superior Court was declined.
The two courts did not re-examine Lula’s conviction, only whether legal procedures were followed correctly and his constitutional rights were observed.
Ordering his surrender on Thursday, Judge Moro said the former president would have a separate cell with its own toilet in Curitiba.
He would not be handcuffed if he came quietly, the judge promised.
As a convict, Lula would normally be barred from standing for election in October but Brazil’s top electoral court reserves the final decision if and when he submits his candidacy.
Lula was convicted last July and originally sentenced to nine and a half years in prison.
He lost his first appeal against the sentence in January, when the appeals court not only upheld his conviction, but increased the sentence to 12 years.
Until recently, defendants in Brazil were allowed to remain free until their final appeal had been exhausted but a 2016 ruling from a lower court allowed for defendants to be sent to jail after a failed first appeal.
Brazil’s Lula to surrender to police