Detectives from Ukraine’s economic security bureau entered Mr Kolomoisky’s house in Dnipro on Wednesday
Ukraine has launched a fresh wave of anti-corruption raids on high-profile figures, including one of the country’s richest men, Ihor Kolomoisky.
The home of former interior minister Arsen Avakov was also searched, as part of the apparent purge.
Ukraine has launched an anti-corruption drive and officials said the leaders of the customs service had been fired.
The head of President Volodymyr Zelensky’s party in parliament said Ukraine would change during the war.
“If anyone isn’t ready for change, then the state itself will come and help them change,” said David Arakhamia on the Telegram messaging app.
Ukraine has come under increasing pressure from its Western partners, notably the EU, to tackle corruption. When Mr Zelensky came to power in 2019 he cited the fight against corruption as one of his main priorities.
Kyiv is due to host a summit with leading EU officials this week, seen by Ukraine as highly important in its push for membership of the 27-member union. Kyiv was granted EU candidate status four months after Russia’s invasion, but it was urged to do more to tackle corruption.
Ten leading Ukrainian figures resigned last week, as part of the purge, including Mr Zelensky’s deputy head of office Kyrylo Tymoshenko.
Severa