The initial claim of a coup was made by the Chief Directorate of Intelligence of the Ukrainian Ministry of Defense, which is Kyiv’s military intelligence agency. In a statement, the spy agency alleged that the coup against President Putin was being planned by “a group of influential figures […] among the Russian business and political elite”. The leaders of the group were “siloviki”—members of the Soviet intelligence and military nomenclature, who rose to power in the 1990s alongside Putin, according to the agency.

These siloviki were oligarchs, business magnates and politicians from the era of Boris Yeltsin, Putin’s predecessor in the Russian presidency. They were allegedly planning to depose Putin “as soon as possible” in a “palace coup” and replace him with his most senior intelligence advisor, Alexander Bortnikov (pictured). Bortnikov is a Soviet-era intelligence operative who today heads the Federal Security Service (FSB), Russia’s domestic security and counterintelligence agency.

There are reports that Putin blames the FSB’s substandard intelligence for the botched military campaign in Ukraine, and that he and Bortnikov have fallen out as a result. Meanwhile, several Yeltsin-era oligarchs have begun to voice criticism of the war in Ukraine—among them the banking magnate Mikhail Fridman, the metals mogul Oleg Deripaska, and Oleg Tinkov, who owns a network of banking and investment firms in Russia.

However, in a report published on Tuesday, the Voice of America, which is funded by the United States Department of State, said Western intelligence officials remained unconvinced of Ukraine’s claims about a possible coup in Moscow. The news service cited anonymous “Western intelligence sources” as saying they could not see men in Putin’s inner circle having the will or ability to turn against the Russian strongman. Moreover, Kremlin grandees like Bortnikov are not qualitatively different from Putin in how they think about Russian domestic and international strategy, the sources said.