The messaging service Twitter is suing the US government over America’s surveillance laws.
It is part of the ongoing battle with federal agencies as the internet industry tries to portray itself as the champion of free speech.
In the law suit Twitter says that current rules prevent it from revealing whether it has or even whether it has not received any national security requests for user information.
This, it argues, violates the Constitution’s First Amendment and intends to take on the US Attorney general.
The move marks an escalation in the Internet industry’s battle over government gagging orders on the nature and the number of personal date requests.
The American Civil Liberties Union has praised Twitter’s action saying it was right to challenge the tangled web of secrecy rules.