This is a list of people who disappeared mysteriously, and whose current whereabouts are unknown or whose deaths are not substantiated, as well as a few cases of people whose disappearance was notable and remained mysterious for a long time, but was eventually explained.
František Gellner, Czech poet, was recruited to the Austro-Hungarian Army at the beginning of World War I and went to Galicia, where he disappeared.
Sigizmund Levanevsky, famous Soviet aviator, together with his crew of five and their Bolkhovitinov DB-A aircraft, disappeared in the vicinity of the North Pole after reporting loss of power from one of their four Mikulin AM-34 engines while attempting to prove a transpolar route between Asia and North America commercially viable.
Genrikh Lyushkov, high-level Soviet defector and former Far East NKVD chief. A participant in the Great Purge, he fled to avoid what he believed would be arrest and execution into the Japanese puppet state of Manchukuo. After his defection, he became a military consultant and analyst for the Imperial Japanese Army. He disappeared during the Soviet invasion of Manchuria and was reported as being last seen in a crowded train station in Dairen (Dalian). Several theories exist about his fate, but he is presumed to have died in 1945, killed either by Soviet or Japanese forces
Henry Borynski, a Polish Catholic priest and outspoken Anti-Communist disappeared in Bradford, Yorkshire
Vladimir Alexandrov, Russian physicist, disappeared while attending a nuclear winter conference in Madrid.
Jure Šterk regularly communicated with radio amateurs while sailing around the world, but all communications ceased around January 1, 2009, as reported by an Australian ham radio operator. His sailboat Lunatic was spotted on January 26 by a merchant vessel, the Aida, and it appeared abandoned. It was found adrift and abandoned on April 30, 2009, by the crew of science vessel RV Roger Revelle.
In 1960, Alexander Solonik was born in Kurgan, Russia. In the late 1980s, he was arrested for rape and sent to prison. In jail, he became targeted for death due to his association with the police. However, Solonik fought off multiple attacks and earned the respect of his fellow inmates. After escaping from prison in April 1990, Solonik became one of the most infamous Russian assassins in history. He murdered a large number of organized crime figures and gained the nicknames “Alexander the Great” and “Superkiller.”The exact number of people Solonik murdered is a mystery, along with much of the details surrounding his life. In the early 1990s, he gained a reputation for being a lethal contract killer who had the ability to shoot ambidextrously. Solonik confessed to killing a large number of criminals, including Viktor Nikiforov, Valery Dlugach, Vladislav Vinner, and Andrey Rura. In 1994, he was arrested at Moscow’s Petrovsky marketplace. He was taken to Detention Center 1 in Moscow, but eventually escaped. Solonik fled to Greece and set up a criminal organization in the area. He purchased a large amount of real estate in Athens and was placed on Russia’s Top 10 Most Wanted list. In 1997, a Greek newspaper reported that a Russian mafia boss had been found dead 15 miles from Athens. The man had been strangled to death and it was concluded that the corpse was Alexander Solonik, despite the fact that his fingerprints in the Interpol database were not accurate. The Greek authorities insisted that the body was not Solonik. However, he was officially declared dead. He’s never been heard from since, and the true influence of Solonik’s criminal network during the mid-1990s remains unknown.
Sergei Tretyakov was a Russian spy who defected to the United States in October 2000. During his time in Russia, Tretyakov was a colonel in the Russian intelligence service (S.V.R.) and oversaw covert operations in New York City and at the United Nations. Starting in 1997, Tretyakov became a double agent and passed secrets to the Americans. After moving to the United States, he was given a package worth $2 million and placed in the Witness Protection Program. In 2008, Tretyakov provided information about the SVR. He said that the Russian intelligence program is just as active today as ever. Tretyakov warned that the world should “wake up” to the danger.He told NPR that his “defection was a major failure of the Russian intelligence.” Some of his revelations include the suggestion that Eldar Kouliev was an SVR spy. He said that U.S. Deputy Secretary of State, Strobe Talbott, was influenced by Russia, along with Canadian Alex Kindy. According to Tretyakov, the KGB fabricated the nuclear winter story to stop the development of the Pershing missiles in Europe. He said that the SVR developed a list of influential political figures that were assassinated in order to bring Vladimir Putin to power. He also recounted a conversation in which a man (Vladimir K. Dmitriev) discussed privately owned nuclear weapons. Sergei Tretyakov also exposed the Russian warfare program known as Active Measures. The program uses misinformation, propaganda, hoaxes, and political persecution to influence world events. Active Measures has been called the “heart and soul of Soviet intelligence,” and is being used to discredit the United States. Some have speculated that Russia orchestrated the Edward Snowden media leak in order to create anger in the United States and Europe, specifically Germany. On June 13, 2010, Sergei Tretyakov died at his house in the United States. The medical examiner reported that he suffocated after choking on a piece of meat. However, rumors persist that he was assassinated by the SVR.