US President Joe Biden instructed US intelligence agencies to investigate who is behind the ransomware cyberattack that hit hundreds of American businesses using Kaseya's software product. Biden said this on Saturday during a trip to Michigan, as Reuters reported.
Biden said "we're not certain" who is behind the attack.
"The initial thinking was it was not the Russian government but we're not sure yet," he said.
According to the president, United States will respond if they determine Russia is to blame.
Security firm Huntress Labs said on Friday it believed the Russia-linked REvil ransomware gang was to blame for the latest ransomware outbreak. Last month, the FBI blamed the same group for paralyzing meat packer JBS SA.
Meanwhile, nearly 500 Coop supermarket stores in Sweden have been forced to close due to an ongoing "colossal" cyber-attack affecting organisations around the world.
Coop Sweden says it closed more than half of its 800 stores on Friday after point-of-sale tills and self-service checkouts stopped working.
The supermarket was not itself targeted by hackers - but is one of a growing number of organisations affected by an attack on a large software supplier the company uses indirectly.