A staff member at San Quentin State Prison and another in Sacramento have become the state’s first two prison employees to test positive for coronavirus, authorities said Friday.

The California Department of Corrections and Rehabilitation released the information Friday.

So far, nobody in the general prison population of either of those prisons has tested positive for coronavirus, prison spokeswoman Dana Simas said.

“If at any point, it is determined there is a potential exposure to the incarcerated population, the (CDCR) will restrict movement at the institution while a contact investigation is underway and quarantine those deemed at-risk for an observation period,” Simas said in a statement. “The well-being of all who live, work and visit state prison are of the utmost importance to the (CDCR), and many measures are in place to prevent and slow the spread of COVID-19.”

A contact investigation, Simas said, occurs when investigators reach out to the those close to anyone who tests positive to determine how many other people that person may have exposed.

Officials did not say whether the officials were under quarantine or isolation or whether either had been hospitalized. Spokeswoman Dana Simas said through an email that no other information, including what the two staff members do at the prisons, will be released.

The other employee works at the California State Prison, Sacramento.