One resident has died from COVID-19 complications, and there have been 18 other confirmed cases of the virus among residents and employees, at a military veteran care facility in Livermore, Veterans Affairs Department officials confirmed on Monday.

The Livermore Community Living Center, which is part of Palo Alto VA Health Care System, is investigating circumstances around how 10 residents and nine employees recently tested positive for COVID-19, VA officials said.

News of the outbreak at the Livermore facility comes as the COVID-19 case count continues to increase in the Tri-Valley over the past week and a half.

As of Sunday, Livermore led the way with 150 confirmed positive cases, followed by Pleasanton with 99 and Dublin with 49, according to the Alameda County Public Health Department. Santa Rita Jail in Dublin, which is kept in a separate statistical category, had 60 cases and Sunol had fewer than 10.

In total, ACPHD reported 5,762 confirmed cases and 133 deaths countywide, as of Sunday.

The exact timeframe for the string of cases at the VA's Livermore Community Living Center, as well as information about the resident who died, have not been released.

Officials confirmed that the veterans who tested positive for COVID-19 were transferred to the VA hospital in Palo Alto for treatment. All residents and staff of the Livermore facility are currently being tested for COVID-19 every three to four days, and anyone who enters the center is screened for the virus.

"Our Employee Occupational Health team is assisting in tracking employee movements within the CLC to prevent further spread of the disease," officials added. "This 'track and trace' approach is an infection control and prevention standard operating procedure any time we identify a staff member who tests positive."

The center has now implemented a universal masking policy for all staff and residents, and anyone who doesn't have a mask is provided one, officials said. Employees following federal guidelines for appropriate personal protective equipment.