The social network and Washington State sue a marketing firm over claims that it deceived users by hiding 'Like' buttons. The firm denies the charge.

A European Parliament rapporteur stands down in protest as a controversial anti-piracy agreement is signed by several countries.

The Russian man accused by Microsoft of being behind the Kelihos botnet attack insists he is "absolutely not guilty".

The FBI asks contractors to suggest a system that can "scrape" information from social networks to build alert maps.