A federal judge froze the assets Friday of Boston Grand Prix president John Casey as part of an $11 million bankruptcy case stemming from the collapse of an Indycar race that had been planned for the Seaport District last Labor Day weekend.

The ruling by Judge Joan N. Feeney came after Casey was accused last week in court filings of using the Boston Grand Prix as “his personal piggy.’’

“John Casey spent hundreds of thousands of dollars of Boston Grand Prix’s money for personal expenses without regard for the interests of creditors,’’ said attorney Kate Cruickshank of the firm Murphy & King, who is representing creditors in the case. “It’s the job of the bankruptcy trustee to recover assets belonging to Boston Grand Prix for all creditors.’’

Casey’s attorney, Michael J. Goldberg, did not immediately respond to a call seeking comment.

In July Boston Grand Prix filed for Chapter 7 bankruptcy, which provides for the liquidation of assets to pay creditors. The company had been besieged by lawsuits since ending its plans.

Race organizers had originally signed a five-year deal with Mayor Martin J. Walsh’s administration to hold the race in the Seaport District. The race was planned for a 2.2-mile temporary street course.

The Globe has reported that tickets went on sale in March, but the race was canceled in late April, amid finger-pointing between promoters and the city. Casey accused the city of making unreasonable demands. The city in return said the promoters were disorganized. Ticket buyers have received refunds.

Andrew Ryan can be reached at acryan@globe-.com. Follow him on Twitter @globeandrewryan.