Police in Britain have defended detaining the partner of a Guardian journalist at Heathrow Airport under terror laws.
They say it was "legally and procedurally sound."
David Miranda claims he was questioned by six agents for nine hours.
His partner, Glenn Greenwald - who interviewed American whistle-blower Edward Snowden - called Mr Miranda's detention a "profound attack on press freedoms".
Meanwhile, the White House has admitted it knew about the arrest - before it happened - but insists the request did not come from them.
Josh Earnest, White House spokesperson said - in a press briefing yesterday - "There was a heads up that was provided by the British government, so this again was something that we had an indication that was likely to occur but it was not something that we requested and it was something that was done specifically by British law enforcement. The United States was not involved ... If you have questions about that, then I would refer you to the British government."
Watch Mr. Earnest's response to a CNN journalist's questions about the arrest:
