Bernie Ecclestone's mother-in-law has been kidnapped in Brazil for a ransom of £28m (€33m), according to reports.
Aparecida Schunck, 67, is the mother of the Formula One boss' wife Fabiana Flosi, 38, and is believed to have been abducted from her home in Sao Paulo.
The ransom demand is the largest in Brazilian history and is throught to have been requested in cash.
The Brazilian magazine Veja reported that the ransom had been demanded in pounds sterling and divided into four bags.
Mr Ecclestone, 85, married Ms Flosi in 2012, three years after meeting her at the Brazilian Grand Prix.
Brazil is hosting this year's Olympic Games in Rio de Janeiro which start next week.
Security has emerged as the top concern, including violence possibly spilling over from Rio's hundreds of slums.
Authorities have said they will be prepared and that some 85,000 police and soldiers will be patrolling during the competitions.
Neither the police in Brazil nor Mr Ecclestone has yet commented on the reports.