Five people have been arrested in connection with a Financial Services Authority (FSA) investigation in to insider dealing and market abuse.
The FSA has executed four search warrants in the City of London, Lincolnshire, Leicestershire and North Yorkshire and arrested the five with the assistance of City of London, the East Midlands and the North of England police forces.
The five, two men aged 37 and 62 and three woman aged 39, 51 and 63, will be questioned in connection with an investigation in to insider trading and market abuse, said the FSA.
The arrests are not linked to any other ongoing insider dealing investigations and the FSA cannot confirm any further details at this time, it added.
The FSA has secured 21 further convictions in relation to insider dealing since 2009 and is currently prosecuting another six individuals.