GENEVA, March 6. /TASS/. US National Security Agency (NSA) leaker Edward Snowden, who has been living in Russia since mid-2013, on Friday made a public appeal for asylum in Switzerland, where he said he once worked under diplomatic cover for the Central Intelligence Agency (CIA).

"I would love to return to Switzerland, some of my favourite memories are from Geneva. It's a wonderful place," he told a Moscow-Geneva videoconference. "I do think Switzerland would be a sort of great political option because it has a history of neutrality."

US prosecutors accuse Snowden of leaking information on US National Security Agency (NSA) secret surveillance programs to mainstream media.

In 2013, he was granted a temporary asylum in Russia after spending more than a month in the transit zone of Moscow's Sheremetyevo airport.

In August 2014, as the asylum expired, Snowden received a three-year residency permit.