London, Jul 28 (IANS): Facebook has taken the European Union to court over privacy concerns as the anti-competition regulators probe the social network for breaching market practices.

Facebook said that accepting the EU demand for internal documents that include 2,500 specific key phrases means "handing over unrelated but highly-sensitive data," reports the BBC.

The European Commission said it will defend the case in court.

Tim Lamb, Facebook's competition lawyer, said that they are cooperating with the commission "and would expect to give them hundreds of thousands of documents".

"The exceptionally broad nature of the commission's requests means we would be required to turn over predominantly irrelevant documents that have nothing to do with the commission's investigations, including highly sensitive personal information such as employees' medical information, personal financial documents, and private information about family members of employees".

Ireland's Data Protection Commission (DPC), which looks into big tech companies and their data practices, has sent a preliminary decision to Facebook-owned WhatsApp for their submissions and made further progress in three other investigations related to Facebook.

Facebook is facing two investigations in the EU to find out if the social network has breached competition laws.