A cyber-criminal gang that took a major US fuel pipeline offline over the weekend has acknowledged the incident in a public statement, said a report.
"Our goal is to make money and not creating problems for society," DarkSide wrote on its website, said the BBC report.
The US issued emergency legislation on Sunday after Colonial Pipeline was hit by a ransomware cyber-attack.
The pipeline carries 2.5 million barrels a day - 45% of the East Coast's supply of diesel, petrol and jet fuel.
The operator took itself offline on Friday after the cyber-attack. Work to restore service is continuing.
On Monday, the FBI officially confirmed that DarkSide was responsible for compromising Colonial Pipeline's networks, saying that it was continuing to work with the firm and other government agencies on the investigation.
During a speech about the economy at the White House on Monday, US President Joe Biden said he was being "personally briefed" on the situation with the pipeline each day.
The White House said there are no issues with fuel supply as officials worked urgently to ascertain the scope and fallout of a ransomware attack, said a CNN report.
"My administration takes this very seriously. We have efforts under way with the FBI and Department of Justice to disrupt and prosecute ransomware criminals," Biden said during remarks on the economy from the White House East Room.
"My administration is also committed to safeguarding our critical infrastructure, much of which is privately owned and managed, like Colonial," the President continued. "Private entities are making their own determination on cybersecurity."