A judge late Tuesday night said he would not approve the sale of Infowars, the website founded by the conspiracy theorist Alex Jones, to the Chicago-based satirical publication The Onion, prolonging a messy tug of war between two high-profile suitors.

The ruling, by Judge Christopher M. Lopez in federal bankruptcy court in Houston, poses a roadblock for The Onion’s plan to take possession of the Infowars site and its associated assets after it won an auction last month. The Onion’s bid was backed by the families of the victims of the Sandy Hook shooting, who in 2022 won a $1.4 billion defamation lawsuit against Mr. Jones.

Mr. Jones spent years claiming that the 2012 school shooting was a hoax and that victims’ family members were actors complicit in the plot. The Onion has said that it wants to turn Infowars into a satirical site mocking the kind of conspiracy theories that Mr. Jones spreads.

Judge Lopez’s ruling put the fate of Infowars in limbo. He instructed a court-appointed trustee, Christopher Murray, to come up with an alternative resolution, though it was not immediately clear what approach Mr. Murray would take. He did not immediately respond to a request for comment.

Ben Collins, the chief executive of Global Tetrahedron, The Onion’s parent company, said the publication was “deeply disappointed” by Tuesday’s decision.

He added that The Onion would “continue to seek a resolution that helps the Sandy Hook families receive a positive outcome for the horror they endured,” adding that the company would continue its pursuit of Infowars in the coming weeks.