Google’s massive ad tech business hasbeen under scrutinyfrom regulators in the US and EU.

The lawsuit would represent the Justice Department’s second monopoly case against Google.

The lawsuit is still working its way through the legal system.

Google has reportedly tried to address the department’s concerns to prevent the new lawsuit.

The companyreportedlytold the Justice Department last year that it’s willing to split off its ad business.

Google declined to comment, and the Justice Department didn’t respond to a request for comment.