SAN BERNARDINO (CBSLA) — Coronavirus appears to be spreading in jails in the Inland Empire.

Two deputy sheriffs assigned to corrections have tested positive for COVID-19, San Bernardino County sheriff’s officials announced Sunday. They both went into self-quarantine last week after experiencing flu-like symptoms and have been off work for a week, according to officials.

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Where the two deputies were exposed to coronavirus is under investigation.

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In Riverside County, two more deputies have also tested positive for coronavirus, according to Riverside County Sheriff Chad Bianco. An inmate has also tested positive, he said in a video announcement posted on social media.

The first deputy to be diagnosed with COVID-19 had been assigned to the jails, Bianco said, but it’s not clear where the two most-recently diagnosed deputies were working.

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As a precaution, several other inmates have been isolated, but are not showing symptoms, he said.