Google, a Silicon Valley internet giant, is being sued in a U.S. District Court in California over alleged anticompetitive practices by Facebook and Twitter.
The antitrust complaint was filed Thursday against the companies by two U.K.-based firms, Becton Dickinson and EY.
In the complaint, which is separate from an earlier antitrust suit filed by Facebook against Google, the complaint says that the companies’ use of their social media platforms to reach millions of people around the world without the help of a third party, which includes the “Internet” is “a widespread and pervasive practice.”
The complaint also names the websites Twitter, Facebook, and Instagram as defendants.
Google is also named as a defendant.
Facebook and Twitter, which are owned by Facebook, said in a statement Thursday that they would not comment on pending litigation.
Instagram also declined to comment on the lawsuit.
In a statement, Facebook said that it believes its practice of using its social media platform to reach a wide array of users around the globe has been legal and consistent with its mission to make our platform as widely accessible as possible.
“We believe that our policies, practices, and practices are legal and appropriate,” the company said.
Facebook’s chief executive, Mark Zuckerberg, also issued a statement in which he acknowledged the importance of the Internet for many, and said the company will continue to build on the great work it’s done for the world.
“This lawsuit is about one company’s alleged anticommunications practices, not about us,” Zuckerberg said.
“We’re proud of what we do, and we’re focused on building a world where every child has the ability to get the education they need and where everyone has access to the information they need to thrive.”
The case centers around Facebook’s use of a service called Instant Articles, which allows people to search the web for news and other content quickly and easily.
The service is available to a wide range of people, from the elderly to kids.
In January, the U.N. International Trade Commission accused Facebook of conspiring to prevent users from finding information and promoting it.
In February, Facebook was accused of violating trade secrets and engaging in anticompetition practices in a separate antitrust lawsuit.
In a separate case, Facebook faces a lawsuit from the U,N.
Intellectual Property Office.