Irish champion jockey Kieren Fallon is among 16 people who have been arrested in England as part of a police investigation into corruption in racing.
The investigation is being led by the City of London police and is thought to involve more than 80 races at English courses over the past two years.
As well as Fallon, jockeys Darren Williams and Fergal Lynch and trainer Karl Burke were also arrested early this morning when 19 addresses were raided by police in Yorkshire and Suffolk.
Police say they have seized a large amount of computer records and documentation which they are now going to start examining in detail.
The police inquiry is thought to have been initiated following an investigation by the Jockey Club.
The Jockey Club is currently investigating charges against Fallon of bringing racing into disrepute.
