Google is reportedly facing an antitrust probe from its home state of California

California has opened its own antitrust probe into Google, Politico reports. The scrutiny intensifies the pressure on the search giant already in the middle of investigations by the US Department of Justice (DOJ) and a host of other US states. It’s not new that the Mountain View-based technology company is facing an antitrust probe as it had been the top news in recent years after the European Commission went after it chiefly.

Attorneys general from 48 states, Puerto Rico and the District of Columbia announced an antitrust investigation into Google back in September. The probe, which only California and Alabama didn’t sign, focuses on Google’s search and advertising business. DOJ has been working closely with the states.

The move by California’s attorney general comes as Google has come under increasing scrutiny from both Congress and foreign regulators for its market conductand acquisitions that have turned it into the world’s top search engine and the most profitable online advertising company.

California’s antitrust probe is different from the multi-state effort, and it’s not yet clear what Google’s home state is targeting. The sate’s attorney general didn’t comment on the investigation when requested by Politico. Alabama is now the only state that is not investigating Google.

Besides the antitrust probe, Google is facing allegations of abusing its dominance in Congress. Google CEO Sundar Pichai will be testifying in front of a House Judiciary panel accompanying the CEOs of Silicon Valley tech giants including Apple, Amazon, and Facebook.