Guardian journalist Glenn Greenwald is planning to release more documents from the cache handed over to him by whistleblower Edward Snowden, claiming that what has been seen so far is just a very small slice compared to the bigger picture.
Greenwald plans to make new revelations public "within the next 10 days or so", expected to be related to secret US backed surveillance of the internet, worldwide.
According to Reuters, Greenwald told a Brazilian congressional hearing, that is itself investigating US surveillance in Brazil, the articles published so far are a "very small part" of the revelations that ought to be.
He said that new leaks will show how the US has been spying and invading the communications of Brazil and Latin America.
Greenwald said that he had recruited experts to help understand some of the 15,000 to 20,000 classified documents from the National Security Agency that Snowden passed him.
He also said that Julian Assange and his Wikileaks organisation had no connection to Snowden's files.
Greenwald apparently speaks to Snowden a lot since he left the transit area of Moscow's Sheremetyevo airport, using very strong encryption.
It is not clear however how Moscow will view this. One of the conditions that Snowden had for receiving temporary asylum in Russia was that he stop leaking. But Greenwald already has access to these files - so technically speaking - these will not be fresh leaks but the disclosure of already leaked material.
Greenwald said Snowden planned to stay in Moscow "as long as he needs to, until he can secure his situation".
Greenwald slammed governments for failing to offer Snowden protection, even while they publicly denounced the US surveillance of their citizens' internet usage.
He claimed Washington was working through diplomatic channels to persuade governments to stop talking about the surveillance programs.