- Aparecida Schunck Flosi Palmeira, whose daughter is married to F1 supremo, was freed Sunday
- Police said she was being held near Brazilian city of Sao Paulo
Aparecida Schunck Flosi Palmeira, 67, was being held in a house in the city of Cotia, Brazil, about 22 miles west of Sao Paulo, the Sao Paulo State public safety office said.
A Facebook page that appears to be Schunck's says she lives in the southeastern Brazilian city.
Two people have been arrested, according to the anti-kidnapping unit of the city's police department.
Images shown on TV Globo show Schunck arriving at a police station in Sao Paulo flanked by the police and amongst a media scrum.
"I ask that bandits stop kidnapping people in Sao Paulo because they will be arrested," she said.
Ecclestone, the billionaire head of F1 racing, has been involved in motorsports for more than 50 years.
The incident comes less than a week before the OIympics are set to start in Rio de Janeiro.
Concerns about crime -- as well as the Zika virus, political corruption, economic woes and a doping scandal -- have many worried about whether Brazil is ready to host the Games