A 32-year-old, Sage employee has been arrested at Heathrow airport, confirmed by the Police.
She was arrested on Wednesday in connection with a fraud investigation and has since been bailed.
Earlier this week the incident of a data breach was reported at software firm Sage, which may have resulted into compromise of personal information for employees at 280 UK businesses.
The firm said it had informed businesses who may be affected.
The FTSE-listed firm provides business software for accounting and payroll services to firms across 23 countries and has 6.1 million customers worldwide.