A series of cyberattacks is underway aimed at the companies and government organizations that will be distributing coronavirus vaccines around the world, IBM’s cybersecurity division has found, though it is unclear whether the goal is to steal the technology for keeping the vaccines refrigerated in transit or to sabotage the movements.

The findings were alarming enough that the U.S. Department of Homeland Security issued its own warning Thursday about the threat.

Both the IBM researchers and the department’s Cybersecurity and Infrastructure Security Agency said the attacks appear intended to steal the network credentials of corporate executives and officials at global organizations involved in the refrigeration process necessary to protect vaccine doses.