Speaking with the NYT in October, Snowden said he did not take any classified documents with him when he ended up in Russia in June.
"There's a zero percent chance the Russians or Chinese have received any documents," Snowden told the paper.
Snowden, who is currently living in an undisclosed location in Russia after receiving temporary asylum, reportedly requested protection from Russian law enforcement after a series of death threats were aired against him in the US media.
"We are concerned with the situation around Edward," Kucherena said on Tuesday. "We see the statements made by some US officials containing potential and implicit threats and openly calling for causing him bodily harm."
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