This follows several days of growing tensions between Kyiv and the oligarch over the control of two energy companies. (Two deputy governors, Hennadiy Korban and Svyatoslav Oliynyk, are separately accused of being involved in criminal activities.) However, Kolomoisky and other oligarchs will retain wide-ranging influence, posing an increasing risk to Ukraine's long-term stability.
More Kyiv-oligarch clashes are likely as the government knows it must push on with a reform and anti-corruption agenda to save the economy.
Oligarchs like Kolomoisky have been vital to the war effort in Donbas and will remain important for security.
'Grey cardinals' and 'observers' are key links between oligarchs and political parties and help ensure oligarch interest are protected.
