The lead U.S. agency handling the coronavirus outbreak says it is investigating a potential cyber incident.

Federal agencies are under continual cyberattack, and the Department of Health and Human Services said in a statement Monday that it had put extra protections in place as it prepared to deal with the coronavirus.

Spokeswoman Caitlin Oakley said in a statement that the department on Sunday “became aware of a significant increase in activity on HHS cyber infrastructure and are fully operational as we actively investigate the matter.”

HHS said it’s coordinating with federal law enforcement to find out what happened.

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