https://www.reuters.com/article/tech-antitrust-google-facebook/google-facebook-agreed-to-team-up-against-possible-antitrust-action-draft-lawsuit-says-wsj-idUSKBN28W0JW

Facebook Inc and Alphabet Inc's Google agreed to "cooperate and assist one another" in case of an investigation into their pact to work together in online advertising, the Wall Street Journal reported late on Monday.