The Federal Trade Commission and 17 state attorneys general on Tuesday filed a lawsuit against Amazon, accusing the e-commerce company of monopolistic practices that raise prices for consumers and prevent competitors from getting into the online-shopping market.

“Amazon is a monopolist and it is exploiting its monopolies in ways that leave shoppers and sellers paying more for worse service,” FTC chair Lina Khan told reporters.

“In a competitive world, a monopoly hiking prices and degrading service would create an opening for rivals and potential rivals to … grow and compete,” she added. “But Amazon’s unlawful monopolistic strategy has closed off that possibility, and the public is paying dearly as a result.”

The federal regulator and a bipartisan group of attorneys general are seeking a permanent injunction on Amazon’s monopolistic control, per the lawsuit. As of now, the plaintiffs are not seeking to break up the company.

Connecticut, Delaware, Maine, Maryland, Massachusetts, Michigan, Minnesota, New Jersey, New Hampshire, New Mexico, Nevada, New York, Oklahoma, Oregon, Pennsylvania, Rhode Island, and Wisconsin joined the FTC in the newly announced litigation.