An Irish regulator helping to police European Union data privacy said Thursday it had fined professional networking platform LinkedIn 310 million euros ($335 million) over breaching users’ personal data for targeted advertising.

European Union regulators slapped LinkedIn on Thursday with a 310 million euro ($335 million) fine for violations of the bloc's stringent data privacy rules. Ireland's Data Protection Commission reprimanded the Microsoft-owned professional social networking site over concerns about the “lawfulness,

LinkedIn, the Microsoft -owned professional networking platform, has been fined 310 million euros (approximately $335 million) by the Irish Data Protection Commission (IDPC). The fine, issued on October 24,