Federal Bureau of Investigation Deputy Assistant Director Tonya Ugoretz told participants in an online panel discussion hosted by the Aspen Institute that the bureau had seen state-backed hackers poking around the US healthcare sector as well.

"We certainly have seen reconnaissance activity, and some intrusions, into some of those institutions, especially those that have publicly identified themselves as working on COVID-related research," she said.

Ugoretz did not name specific countries and she did not identify any targeted companies or institutions.

Ugoretz said it made sense for organizations working on promising treatments or a potential vaccine to tout their work publicly. However, she said, "The sad flipside is that it kind of makes them a mark for other nation-states that are interested in gleaning details about what exactly they're doing and maybe even stealing proprietary information that those institutions have."

Ugoretz said that state-backed hackers had often targeted the biopharmaceutical industry but said "it's certainly heightened during this crisis."

The FBI and the Office of the Director of National Intelligence did not immediately return emails seeking comment. The Florida-based Health Information Sharing and Analysis Center, which helps coordinate cybersecurity across the health sector, did not immediately return a message seeking comment.

The potential for hackers to target research and healthcare institutions related to coronavirus treatments and vaccines has been on U.S. cybersecurity officials' radar since the start of the outbreak, which began in China late last year.

Last month, Reuters identified two independent attempts by different state-backed hacking groups to penetrate the World Health Organization, which is helping to organize the global response to the epidemic.