There are many more revelations to come from the leaks about US spying from Edward Snowden, with journalist Glenn Greenwald testifying that he had received around 20,000 files from the American whistleblower and fugitive.

Greenwald has been the journalist working with Snowden to release information about the US spying programmes both domestic and international that have caused such controversy around the globe. He has worked with The Guardian the UK to reveal secrets about NSA spying within US borders and on Western Europe, as well as with Brazillian newspaper O Globo, where he has focused his revelations on those affecting Brazil and South America.

Greenwald was speaking before a Brazilian Senate foreign relations committee on Tuesday when he said:

“I did not do an exact count, but he gave me 15,000, 20,000 documents. Very, very complete and very long,” Greenwald told Brazilian lawmakers…The stories we have published are a small portion. There will certainly be more revelations on the espionage activities of the US government and allied governments…on how they have penetrated the communications systems of Brazil and Latin America”

It is believed that Snowden handed over the files to Greenwald whilst he was hiding in a hotel room in Hong Kong before fleeing to Moscow, where he has recently been provided with a temporary visa.