The detention and subsequent criminal investigation into the partner of a Guardian journalist threatens to undermine the position of the free press around the world, the editors of several northern European newspapers have warned.
In an open letter to British Prime Minister David Cameron, the editors of Denmark's Politiken, Sweden's Dagens Nyheter, Norway's Aftenposten and Finland's Helsingin Sanomat describe the detention of David Miranda, partner of the Guardian's Glenn Greenwald, as harassment.
They say that the "events in Great Britain over the past week give rise to deep concern" and call on the British Prime Minister to "reinstall your Government among the leading defenders of the free press".
Miranda was detained by the London Metropolitan police for nine hours as he was passing through Heathrow on his way to Brazil.
Greenwald has broken a series of stories about the US intelligence agencies based on material leaked by the National Security Agency whistleblower Edward Snowden.