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.
President Volodymr Zelensky said raids were necessary to ensure "people do not abuse power".
Speaking on Wednesday President Zelensky said: "Unfortunately, in some spheres, the only way to guarantee legitimacy is to change leaders along with institutional changes implementation."