Twitter is contesting a US court order ordering it to hand over tweets written by an activist who took part in the Occupy Wall Street protests last year.
(BBC NEWS) NEW YORK - The micro-blogging service disputes a judge's ruling that messages are owned by the firm rather than its users.
The American Civil Liberties Union commended the company for defending free speech rights.
Twitter's lawyer, Ben Lee, said: "Twitter's terms of service make absolutely clear that its users "own" their own content. Our filing with the court reaffirms our steadfast commitment to defending those rights for our users."