Fb Chief Working Officer Sheryl Sandberg speaks on stage throughout Fb session on the Cannes Lions 2019 : Day Three on June 19, 2019 in Cannes, France.

Richard Bord | Getty Pictures

Google and Facebook pledged to assist each other in the event that they ever confronted an investigation into their pact to work collectively in internet marketing, in line with a report from The Wall Street Journal on Tuesday.

The story is predicated on an unredacted model of a lawsuit filed by 10 U.S. states towards Google final week that was seen by the Journal.

Google and Fb reportedly made a deal in September 2018 wherein Fb agreed to not compete with Google’s internet marketing instruments. In return, the social media large was given “particular therapy” when it used them itself, in line with the Journal.

The lawsuit reportedly states that Google and Fb knew their deal might end in antitrust investigations.

A Google spokesperson informed CNBC that the claims made within the lawsuit have been inaccurate. “The concept that this was a secret deal is simply flawed. We have been public about this partnership for years,” they stated.

Fb didn’t instantly reply to CNBC’s request for remark.

Learn The Journal’s full story here.