A landmark legal battle over the personal data Facebook releases to US security services has been referred to the European Court of Justice.

The initial case was taken in Ireland, where Facebook's European HQ is based.

Privacy campaigners want the Irish data watchdog to audit the material Facebook gives to US security agencies.

It follows Edward Snowden's claims the US National Security Agency (NSA) was secretly accessing users' private data in several firms, including Facebook.

http://www.bbc.co.uk/news/world-europe-27900531