A credit union based in Houston has slapped Google with an antitrust suit, claiming that the Big Tech titan broke California state antitrust law by allegedly monopolizing the online search advertising market with its Google Search feature.

Cathy K. Robinson of Wright, Finlay & Zak filed the complaint on Tuesday in Santa Clara County Superior Court on behalf of First Service Credit Union. The suit, which accused Google of abusing its "monopoly power" to exert unchecked control over the "quantity of ad inventory," alleged violations of California's Cartwright Act, unfair business practices and unfair competition. Robinson did not immediately return a request for comment and counsel has yet to appear for the defendant.