Russian Empire | Russian language | Russian Academy of Sciences | Russian Orthodox Church | Secret Intelligence Service | Russian Civil War | Victoria's Secret | Russian Revolution | United States Department of Health and Human Services | The Secret Garden | United States Secret Service | Russian Soviet Federative Socialist Republic | Imperial Russian Navy | Russian Far East | General Services Administration | On Her Majesty's Secret Service (film) | On Her Majesty's Secret Service | Office of Strategic Services | Russian Revolution (1917) | Russian Navy | Russian Air Force | secret society | Imperial Russian Army | Secret Service | Catholic Relief Services | Amazon Web Services | Russian literature | Inter-Services Intelligence | Returned and Services League of Australia | Tata Consultancy Services |
Matthew Rojansky, on CNN, suggested several possible motivations for the attack, ranging from random acts of violence, or the work of gangs from Ukraine’s criminal underworld and endlessly feuding oligarchs, to international terrorism linked to al-Qa'eda, up to the eventual involvement of Russian secret services.