President Joe Biden said a ransomware hack that shuttered the largest American petroleum pipeline between Texas and New York is not attributable to Russian President Vladimir Putin, nor his government, but he intends to call on his counterpart to crack down on cybercriminals.

“We don’t believe the Russian government was involved in this attack, but we have strong reason to believe the criminals who did the attack are living in Russia,” Biden said while speaking from the White House’s Roosevelt Room, adding that he intends to raise the issue with Putin when they meet.