3 suspected spies for Russia arrested in the U.K.

Three Bulgarian nationals suspected of spying for Russia have been arrested by counterterrorism detectives in the United Kingdom.

London's Metropolitan Police have confirmed five people were arrested in February under Britain's Official Secrets Act, and that three of them were charged with possession of false identity documents with improper intention.

The charges were first reported by the BBC, which it says are part of a major national security investigation.