A small group of Russian insiders expresses concerns over Russian President Vladimir Putin’s invasion of Ukraine, citing potentially devastating political and economic shocks that could send Russia back by decades.

Bloomberg had spoken to 10 Russian insiders who have direct knowledge of what was happening behind the scenes. According to their sources, critics of the invasion remain limited at the very top of Russia’s power structure. However, this number has been consistently growing across senior government officials and state-run enterprises.

The ten Russian insiders spoke under the condition of anonymity to protect themselves from the possible consequences of their statements.

Sources say there is currently no chance that Putin will pull out of the war in Ukraine and no hope that someone from the inside will step up and challenge the Russian president. Putin has further narrowed down his inner circle to a limited group of hardliners he trusts.