On Wednesday, Bayern Munich chairman Oliver Kahn said the Bundesliga champions cooperate with authorities in connection with alleged violations of Germany’s minimal wage laws.

“Of course, we are fully cooperating with the authorities on this matter. It is in our interest that these things are completely cleared up,” Kahn told DPA.

Broadcasters WDR had reported that several members of Bayern’s past and present leaders are under investigation over alleged wrongdoings in the payments of coaches at the club academy.

Former coaches said they worked more than the hours allowed within their 450-euros (510 dollars) mini-jobs in the report.

WDR said that Munich’s central customs office is leading the probe on behalf of a local prosecution office.

Neither office would confirm the probe, but a customs office spokesman told DPA that it is customary at shareholders companies like Bayern that first investigations are directed against club bosses.

Bayern is not the first Bundesliga club confronted with such allegations. The authorities searched the offices of Bavarian rivals Augsburg in summer over payment methods for coaches who are not employed full-time.