Update | ‘I’m not working for Russia’: Edward Snowden denies sharing secrets with Kremlin

Former US National Security Agency contractor Edward Snowden told a US television interviewer on Wednesday he was not under the control of Russia’s government and had given Moscow no intelligence documents after nearly a year of asylum there.

“I have no relationship with the Russian government at all,” Snowden said in an interview with NBC News, his first with a US television network.

“I’m not supported by the Russian government. I’m not taking money from the Russian government. I’m not a spy.”

The remarks by Snowden, whose leaks about highly classified US surveillance programmes shook the National Security Agency and prompted limited reforms by President Barack Obama, were his most extensive to date on his relations with his host government.

Current and former US intelligence officials have said it is unlikely Russian security services have not squeezed Snowden for secrets.

“I think he is now being manipulated by Russian intelligence,” former NSA director Keith Alexander said last month.

But Snowden – who said he wants to return to the United States – said he destroyed classified materials before transiting to a Moscow airport, where he was prevented from onward travel.

"I took nothing to Russia, so I could give them nothing," he told NBC’s Brian Williams in the hour-long interview.