U.K. charges three alleged Russian spies over fake documents amid national security probe

Five people were arrested in February in the U.K. as part of a national security investigation.
Three Bulgarian nationals were charged with possessing false identity documents from multiple countries.
The three individuals are accused of spying on behalf of Russian security services.
Neighbors described two of the suspects, identified as a couple, gifting pies and cakes.
The U.K. views Russia as a growing threat to national security.