A husband and wife, Nikolai and Elena Šapošnikov, have been outed as Russian spies working for the GRU, aiding in bombings and poisonings across Europe. They lived in Czechia under false pretenses, posing as naturalized citizens, and were involved in arms dealing. The couple provided support to GRU Unit 29155, a sabotage squad responsible for attacks in Czechia and Bulgaria. They also owned a villa in Greece that served as a safehouse for GRU operatives.