A man and a woman in Harris County have tested positive for coronavirus, joining a previously reported case in Fort Bend County on Wednesday, the Houston Chronicle reported.

The two cases — which have been verified by the U.S. Centers for Disease Control — are travel-related, and there is no evidence the case was community-spread, Harris County officials said.

The news comes one day after a man in Fort Bend County, also in the Houston area, tested positive for COVID-19, the illness linked to the new coronavirus. The 70-year-old man had recently traveled abroad.

One of the two people who tested positive Thursday is a Rice University employee, Houston-based KDFW-TV reported.

The employee — and several students, faculty and staff who had come into contact with the employee — had self-quarantined, Rice officials said in a statement.

"The affected employee's presence on campus was limited to one building, which has been extensively and continuously sanitized along with the rest of the campus," the statement says.

Rice University is not planning to suspend campus operations or classes.

"This is distressing news for our colleague, the colleague’s family and for the entire campus," Rice President David Leebron said. "Rest assured that we are doing everything possible to prevent the spread of the virus and ensure the safety of our community."