WASHINGTON, D.C.: The federal government is working with the Georgiabased company that shut down a major pipeline transporting fuel across the East Coast after a ransomware attack, the White House says.

for The various government scenarios and is planning working with state and local authorities on measures to mitigate any potential supply issues, officials said Saturday. The attack is unlikely to affect gasoline supply and prices unless it leads to a prolonged shutdown, experts said.

Colonial Pipeline did not say what was demanded or who made the demand. Ransomware attacks are typically carried out by criminal hackers who scramble data, paralyzing victim networks, and demand a large payment to decrypt it.

Colonial Pipeline did not say what was demanded or who made the demand. Ransomware attacks are typically carried out by criminal hackers who scramble data, paralyzing victim networks, and demand a large payment to decrypt it. The attack on the company, which says it delivers roughly 45 percent of fuel consumed on the East Coast, underscores again the vulnerabilities of critical infrastructure to damaging cyberattacks that threaten to impede operations. It presents a new challenge for an administration still dealing with its response to major hacks from months ago, including a massive breach of government agencies and corporations for which the US sanctioned Russia last month.

In this case, Colonial Pipeline said the ransomware attack Friday affected some of its information technology systems and that the company moved “proactively” to take certain systems offline, halting pipeline operations. In an earlier statement, it said it was “taking steps to understand and resolve this issue” with an eye toward returning to normal operations.

The Alpharetta, Georgia-based company transports gasoline, diesel, jet fuel and home heating oil from refineries located on the Gulf Coast through pipelines running from Texas to New Jersey. Its pipeline system spans more than 5,500 miles, transporting more than 100 million gallon a day.

The private cybersecurity firm FireEye said it’s been hired to manage the incident response investigation.

Oil analyst Andy Lipow said the impact of the attack on fuel supplies and prices depends on how long the pipeline is down. An outage of one day or two would be minimal, he said, but an outage of five or six days could cause shortages and price hikes, particularly in an area stretching from central Alabama to the Washington, D.C., region.

Lipow said a key concern about a lengthy delay would be the supply of jet fuel needed to keep major airports operating, like those in Atlanta and Charlotte, North Carolina.

A leading expert in industrial control systems, Dragos CEO Robert Lee, said systems such as those that directly manage the pipeline’s operation have been increasingly connected to computer networks in the past decade.

But critical infrastructure companies in the energy and electricity industries also tend to have invested more in cybersecurity than other sectors. If Colonial’s shutdown was mostly precautionary — and it detected the ransomware attack early and was well-prepared — the impact may not be great, Lee said.

While there have long been fears about US adversaries disrupting American energy suppliers, ransomware attacks by criminal syndicates are much more common and have been soaring lately. The Justice Department has a new task force dedicated to countering ransomware attacks.

The attack “underscores the threat that ransomware poses to organizations regardless of size or sector,” said Eric Goldstein, executive assistant director of the cybersecurity division at the federal Cybersecurity Infrastructure and Security Agency.

“We encourage every organization to take action to strengthen their cybersecurity posture to reduce their exposure to these types of threats,” Goldstein said in a statement.

Ransomware scrambles a victim organization’s data with encryption. The criminals leave instructions on infected computers for how to negotiate ransom payments and, once paid, provide software decryption keys.

The attacks, mostly by criminal syndicates operating out of Russia and other safe havens, reached epidemic proportions last year, costing hospitals, medical researchers private businesses, state and local governments and schools tens of billions of dollars. Biden administration officials are warning of a national security threat, especially after criminals began stealing data before scrambling victim networks and saying they will expose it online unless a ransom is paid.