German investigators said on Friday that they had arrested 17 people, including two in Switzerland, in connection with the "worst ever" European match-fixing scandal.
Officials from an anti-fraud unit based in Bochum in the Ruhr region said those arrested this week were suspected of trying to manipulate the outcome of about 200 games in nine countries.
The group is suspected of trying to bribe players, coaches, referees and other officials and of running an international gambling ring that took bets from clients in Europe and Asia.
The officials refused to identify the people who had been arrested or to say specifically which games were in question. However they did reveal that 22 second division matches in Switzerland (Challenge League) were under strong suspicion of manipulation.
Both the Swiss Football League and the Swiss Football Association said they knew nothing about fixed games on their patches.
"There has been no investigation underway until now. No facts are known to us," Edmond Isoz of the league told the Swiss news agency on Friday.
Uefa, the European soccer governing organization, declined to give specifics, but confirmed that all the affected matches took place in 2009.
"Without question, this is the biggest betting fraud in the history of Uefa," said Peter Limacher, who oversees anti-fraud operations at the organisation.
swissinfo.ch and agencies