Judge Hiram Puig-Lugo of the Superior Court of the District of Columbia granted Amazon’s motion to dismiss the complaint filed last year by Washington DC attorney-general Karl Racine.

“We believe that the Superior Court got this wrong, and its oral ruling did not seem to consider the detailed allegations in the complaint and a recent decision of a federal court to allow a nearly identical lawsuit to move forward,” the office of the attorney-general spokesman said in an emailed statement, adding that the office was considering its legal options.

The decision did not state a reason for dismissing the case.

Amazon did not immediately respond to a Reuters request for comment.

Racine alleged the online retailer’s policy could make prices for a given product more expensive on platforms that compete with Amazon, since its prices include fees that can run as high as 40% of the total price.

Amazon on Thursday closed a US$8.5 billion deal to buy MGM, combining the fabled moviemaker behind “Rocky” and James Bond with the Seattle-based retailing giant as it looks to draw consumers through more streaming video.