Several companies associated with Perth Glory owner and businessman Tony Sage have been raided by federal police.
It is understood the Australian Federal Police (AFP) spent several hours in the soccer club's Leederville building as well as at the office of mining company Cape Lambert Resources, which Mr Sage chairs.
A small contingent of media gathered on Wednesday afternoon outside Mr Sage's City Beach home, where a woman drove a four-wheel drive into the garage about 4.20pm.
She closed the garage behind her and did not answer the home's doorbell.
An AFP spokeswoman said she could not comment on an ongoing investigation but did confirm several commercial and residential premises were raided in Perth and Sydney on Wednesday.
"The AFP can confirm that today a number of search warrants were executed on commercial and residential premises in Perth and Sydney," she said in an emailed statement.
The searches were part of an ongoing AFP investigation in partnership with commonwealth agencies including the Australian Crime Commission, Australian Tax Office, and Australian Securities and Investments Commission, she said.
"The investigation is ongoing, therefore it is not appropriate to make any further comment at this point in time," she said.
Cape Lambert Resources and the Perth Glory both said on Wednesday they would not comment on the matter.
Mr Sage was not able to be contacted.
Cape Lambert Resources went into a trading halt earlier in the year after being hit with a $95 million tax bill.
Mr Sage, whose sporting interests include the Glory and a plan to establish a National Rugby League team in Perth, said at the time that Cape Lambert Resources would contest the bill.
But Cape Lambert recently had to hand over $33 million to the ATO while the dispute is processed.
- with AAP