British regulators are to investigate whether Facebook broke data protection laws by letting researchers conduct a psychological experiment on unknowing users.
The Information Commissioner's Office said it would be asking the social network questions and would also liaise with Irish regulators, as the company's European headquarters are in Dublin.
Although the regulator has not specified which laws the site may have infringed, it has the power to force companies to change their policies and can also issue fines up to £500,000 for breaching the Data Protection Act.
More top news
Edinburgh's poet laureate has offered some words of reconciliation as Scotland prepares to vote on independence in just two days' time.
Temperatures will be on the rise in the next few days, with highs of 25C in the sunshine by Thursday, but do not expect clear blue skies.
A woman who lost her fiance just before they were due to marry has created a moving tribute using the wedding dress she would have worn.