The first government lawsuit in the United States accusing Amazon of breaking antitrust laws was thrown out on Friday.

The motion to dismiss the complaint was granted by the Superior Court of the District of Columbia. The reason for the dismissal was not stated in the records.

Merchants that use Amazon to sell products were the focus of the lawsuit. According to the lawsuit, Amazon made them sell their wares on its site at the lowest price they charged elsewhere on the web or at a lower price entirely. The suit argued that merchants raised prices because of that.

The office of Mr. Racine was considering its legal options after the Superior Court got this wrong.

Regulators, lawmakers and law enforcement agencies are trying to rein in the power of tech companies. The federal government has sued Facebook over allegations that it stifled competition by buying start-ups that could have challenged its dominance in the social network's market.

The tech giants have continued to grow. Microsoft said in January that it would buy the video game studio. Amazon said on Thursday that it had completed its purchase of the Metro-Goldwyn-Mayer movie studio, which owns part of the James Bond franchise.