The US government was preparing to sue Google Tuesday in what would be the biggest antitrust case in decades, media reports said.
The Wall Street Journal and New York Times said the Justice Department suit will accuse the California tech giant of illegal monopoly behavior to preserve its dominance in internet search and advertising.
It was not immediately clear what remedy the government was seeking in the suit, which could take years to resolve. But it could force changes in business practices or break off segments of the Google empire.
The Justice Department had no immediate comment but scheduled a briefing for media later Tuesday. Google did not immediately respond to an AFP request for comment.