LONDON » The Guardian journalist at the center of a series of revelations about the National Security Agency’s sweeping surveillance programs says his source, Edward Snowden, told him he never gave any information to the Russian or Chinese governments.

Glenn Greenwald says in an article published today on the Guardian’s website that he spoke to Snowden over the weekend and on Tuesday and that the leaker "vehemently denied" rumors that his data had been acquired by Moscow or Beijing.

Greenwald quotes him as saying that "I never gave any information to either government, and they never took anything from my laptops."

Critics of Snowden’s leaks have often wondered at his relationship with Chinese or Russian authorities.

Greenwald did not say where Snowden is or where he is expected to go.