Source: Federal Bureau of Investigation FBI Crime News
May 10, 2021 update: The FBI confirms that the Darkside ransomware is responsible for the compromise of the Colonial Pipeline networks. We continue to work with the company and our government partners on the investigation.
Original May 9, 2021 statement:
The FBI was notified of a network disruption at Colonial Pipeline on May 7, 2021. We are working closely with the company and our government partners.