Andrej Babiš, the Czech Republic’s prime minister, is the country's second richest man, worth an estimated $4.1 bn (£3bn). He was sworn in as PM last month after running on a populist, Trump-style anti-immigration platform.
An EU report concluded that numerous laws were broken to obtain European subsidies for a hotel and conference centre he owns.
The union’s anti-fraud unit, Olaf, said violations that potentially broke Czech law on subsidy fraud were committed in winning a €1.67m (£1.49m) grant for the Čapí Hnízdo (Stork’s Nest) complex south of Prague. He has been charged with fraud over the affair.