– ‘More aggressive’: Greenwald vows to publish more secrets after UK detains partner

Glenn Greenwald, the Guardian journalist who first published secrets leaked by former NSA contractor Edward Snowden, promised Monday to release more documents, saying the UK would be “sorry” for detaining his partner for nine hours.

The journalist’s partner, David Miranda, was held by British authorities under anti-terrorism laws while transiting through London’s Heathrow Airport on his way to Rio de Janeiro on Sunday.

The US government has released a statement saying that British officials told them about their decision to detain Miranda, although Washington denied its own involvement.

“This is a decision they made on their own,” White House spokesman Josh Earnest told reporters at a briefing.

The move by UK authorities sparked a furious response from Greenwald.