Attorneys general in 50 U.S. states and territories have launched a joint antitrust investigation of Google, they announced Monday. The investigation, which is not a lawsuit, will seek to determine whether Google's dominance of search and advertising online violates antitrust regulations. Google faced a previous probe from the Federal Trade Commission, which evaluated the tech giant's methods but ultimately decided not to impose a major fine or force it to break up. Google has not yet commented on the newly announced investigation.

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