Signage will be displayed on a fence at the Colonial Pipeline Co. Pelham intersection and terminal in Pelham, Alabama, USA on Monday, September 19, 2016.

Luke Sharrett | Bloomberg | Getty Images

Fuel prices rose in stores on Sunday evening as much of one of the largest pipelines in the US remains closed after a year Cybersecurity attack.

Gasoline futures jumped 2% to $ 2,168 a gallon while Heating oil futures rose 1.2% to $ 2.03.

West Texas Intermediate Crude Oil FuturesThe US oil benchmark rose 56 cents to $ 65.46 a barrel. International benchmark Brent crude oil traded at $ 68.95 a barrel, for a profit of 65 cents. Natural gas futures were at $ 2.96 per million British thermal units while

Colonial Pipeline announced Sunday evening that some of its smaller side lines between terminals and delivery points are back online, but the main lines are still down.

“We are in the process of restoring service to other side panels, and will only bring our entire system back online if we believe it is safe and fully comply with all federal regulations,” the company said in a statement.

How quickly service is restored in the pipeline remains the deciding factor. While fuel depots are usually stored for a few days in tank farms, a prolonged outage can lead to an increase in fuel prices.

The Colonial Pipeline, which operates the largest pipeline transporting fuel from the Gulf Coast to the northeast, “suspended all pipeline operations” on Friday evening as a proactive measure following a ransomware cyberattack.

The pipeline is an essential part of the US petroleum infrastructure and transports around 2.5 million barrels of gasoline, diesel fuel, heating oil and jet fuel every day. The pipeline is more than 5,500 miles and carries nearly half of the east coast’s fuel supply. The system also supplies fuel to airports, including in Atlanta and Baltimore.

“Without this there is no transport in the region, so it is important that the pipeline is back on stream as soon as possible,” said Patrick De Haan, Head of Petroleum Analysis at GasBuddy. “The effects will potentially increase exponentially after about day 5,” he added.

President Joe Biden was notified of the pipeline’s closure Saturday morning, and the Department of Homeland Security’s cybersecurity and infrastructure security agency is coordinating with the Colonial Pipeline.

US Secretary of Commerce Gina Raimondo said Sunday that it is “All hands on deck are trying now.”

“We are working closely with the company, state and local authorities to ensure that they are back to normal operations as soon as possible and that there are no disruptions in supply,” she told CBS ‘Face the Nation.

The pipeline failure comes as Americans start traveling again as restrictions are lifted and Covid vaccination rollout accelerates. On Friday, the TSA checked more than 1.7 million passengers, the highest figure in more than a year.

“The colonial outage comes at a critical time for the recovering US economy: the start of the summer driving season,” said ClearView Energy Partners. “Persistent disruption that causes pump prices to rise significantly could increase the prospect of domestic policy intervention,” the company added.

The national average for a gallon of gasoline was $ 2,962 on Sunday, up 60% year over year, according to AAA.

Become a smarter investor with CNBC Pro.
Get stock picks, analyst calls, exclusive interviews and access to CNBC TV.
Sign in to start a free trial today

– CNBC’s Emma Newburger contributed to the coverage.