Brazil's police have cancelled the passports of Flávio Bolsonaro, the defeated right-wing presidential candidate, after he failed to surrender them to authorities as ordered.

On Monday, Brazil's Supreme Court gave Bolsonaro 24 hours to hand over his passports as part of an investigation into alleged money laundering, which he denies. When the deadline passed without compliance, police revoked the documents. Federal officers began checking border crossings to determine whether Bolsonaro had left the country, with a police source telling BBC News Brasil that investigators were looking into possible travel to neighbouring Argentina. Argentine authorities told the BBC they have no record of Bolsonaro crossing into their country.

The 45-year-old senator faces multiple investigations. He is already under investigation for alleged corruption related to financing of a film about his father, former President Jair Bolsonaro, who was convicted of plotting a coup and is under house arrest. On Tuesday, Brazil's Supreme Court ordered police to probe Bolsonaro's electoral campaign over alleged foreign funding.

Bolsonaro lost a presidential run-off to left-wing incumbent Luiz Inácio Lula da Silva on Sunday. Lula won 51.79% of the vote to Bolsonaro's 48.21%, a margin of 4.4 million votes. Bolsonaro had been expected to win the race. Opinion polls before the vote had put him narrowly ahead, and his first-round victory on October 4 suggested he was likely to prevail in the run-off.

Bolsonaro has not conceded defeat. Instead, he has called for the election to be annulled, arguing he was disadvantaged because voting was extended by two hours on election day. He described the extension, ordered by a Supreme Court justice, as a "dirty trick". Both his party and Lula's party had requested the extension. The Liberal Party, which Bolsonaro represented, has accepted the result, though it said the extension "merits investigation".

When the Supreme Court issued its passport order, Bolsonaro said he had no plans to leave Brazil and intended to remain to lead the opposition.