https://arstechnica.com/information-technology/2021/05/major-ransomware-attack-cripples-gas-pipeline-on-us-east-coast/

On Friday, Colonial Pipeline took many of its systems offline in the wake of a ransomware attack. With systems offline to contain the threat, the company's pipeline system is inoperative. The system delivers approximately 45 percent of the East Coast's petroleum products, including gasoline, diesel fuel, and jet fuel.

Colonial Pipeline issued a statement Sunday saying that the US Department of Energy is leading the US federal government response to the attack. "[L]eading, third-party cybersecurity experts" engaged by Colonial Pipeline itself are also on the case. The company's four main pipelines are still down, but it has begun restoring service to smaller lateral lines between terminals and delivery points as it determines how to safely restart its systems and restore full functionality.