The federal government filed a sealed response Friday to the Supreme Court involving a mystery case with possible ties to special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE.

CNN reports that the federal government has filed a response to a temporary pause the court put on an order holding an unnamed, foreign government-owned company in contempt.

Supreme Court Chief Justice John Roberts halted the contempt order on Sunday after a lower court upheld the order earlier this month.

It would be the first known challenge to a case apparently related to the Mueller probe to reach the Supreme Court, CNN noted.

ADVERTISEMENT

The mystery company argued that it was immune from criminal proceedings under the Foreign Sovereign Immunities Act and that the subpoena was unenforceable because it would require “the Corporation” to violate “Country A’s” domestic law.

The contempt order also included a $5,000-a-week fine.

Roberts’s order was only temporary until the court got further orders, though with the government’s response he could refer the case to the whole Supreme Court to determine next steps.

If the court decides to fully review the lower court’s ruling, it would take a majority of the nine justices to keep in place the hold on the contempt order.

While Mueller’s main focus is on possible ties between the Trump campaign and Russia during the 2016 election, he has reportedly investigated actions involving other countries as well, including Turkey, Ukraine and the United Arab Emirates.

The case has drawn widespread rumors that Mueller might be involved due to its secrecy and similarities to at least one other Mueller subpoena case.