A lawsuit against internet giants Facebook and Google alleges the firms reached an agrement to “cooperate and assist one another” in the event an investigation was launched into an earlier agreement to work together in online advertising, according to a report in The Wall Street Journal on Tuesday.

The report is based on a review of an unredacted version of the suit filed by 10 Republican states attorney general.

The suit alleges “the two companies cut a deal in September 2018 in which Facebook agreed not to compete with Google’s online advertising tools in return for special treatment when it used them,” The newspaper reported.

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