German prosecutors say they have indicted two people suspected of spying for Russia on Germany, the European Union, and NATO.

Federal prosecutors announced this week that the pair, known only as Andreas and Heidrun A., have been charged with espionage. The couple is alleged to have spent more than 20 years in Germany, communicating with their Russian handlers by radio, Internet, and “dead drops,” materials placed at a specific location for the handlers to pick up later.

Germany says between 2008 and 2011, they also worked with a contact at the Dutch foreign ministry who passed them documents about EU and NATO affairs. They are reported to have been paid around $125,000 per year for their work.

German authorities arrested the South American-born couple nearly a year ago on suspicion of spying. Authorities say they are believed to have entered Germany, posing as Austrian citizens, before the fall of the Soviet Union and the Berlin Wall.