Zdravko Mamic, the chief executive of Croatian soccer team Dinamo Zagreb, was arrested on Wednesday for inflicting financial damage on the club through dubious transfers, according to Croatian state television and a police source.
A police source confirmed the reason for the arrest.
Mamic's lawyer declined to comment on the matter.
According to the state TV report, four other people were also arrested, while Dinamo Zagreb said on its website that an anti-corruption police unit had entered the club premises in early morning.
Zdravko Mamic and his brother Zoran, who is Dinamo's coach, were previously detained in July for questioning over embezzlement and tax evasion, before being released.