In March, the Federal Office for the Protection of the Constitution is said to have approached the defence industry to press for stricter security standards.
Vyacheslav Solovyov's arrest was personally overseen by the head of the Foreign Intelligence Service’s (SVR) Internal Security Directorate, The Insider reported.
Kyiv says it has arrested nearly 200 teenagers in cases relating to espionage, arson and the placement of explosive devices organized by Russian intelligence.