A BBC News investigation revealed that three Bulgarians convicted of spying for Russia attended a Brexit debate event in the Palace of Westminster in May 2016. Orlin Roussev, Biser Dzhambazov, and Katrin Ivanova were photographed with representatives of European political parties. Despite their attendance, there is no suggestion of wrongdoing by the event's organizers or attendees. The spies conducted surveillance operations across Europe targeting enemies of Vladimir Putin. The investigation raises concerns about security in Parliament amidst ongoing espionage activities. Teljes cikk (bbc.com europe)