Britain has been forced to remove some of its spies after Russia and China accessed the top-secret raft of documents taken by former US intelligence contractor Edward Snowden, British media reported.
The BBC and the Sunday Times cited senior government and intelligence officials as saying agents had been pulled, with the newspaper saying the move came after Russia was able to decrypt more than one million files.
“It is the case that Russians and Chinese have information. It has meant agents have had to be moved and that knowledge of how we operate has stopped us getting vital information,” a Downing Street source said, according to the newspaper.
The BBC said on its website, meanwhile, that a government source said the two countries “have information” that spurred intelligence agents being moved, but said there was “no evidence” any spies were harmed.
Snowden fled to Russia after leaking the documents to the press in 2013 to expose the extent of US online surveillance programmes and to protect “privacy and basic liberties”.
The Sunday Times said other government sources claimed China had also accessed the documents, which reveal US and British intelligence techniques, leading to fears that their spies could be identified.