A second patient from Hale Nani Rehabilitation and Nursing Center was diagnosed with COVID-19, state health officials confirmed Tuesday, marking the third case reported within a week at the facility.

On Monday, the first patient was diagnosed with COVID-19 upon transfer to an Oahu hospital, state health officials said Monday.

Last Friday, a nurse who worked with patients was diagnosed with COVID-19 after first showing symptoms on June 10.

The elderly care facility is the largest in the state, with 288 beds.

Department of Health Spokeswoman Janice Okubo said the patient is in isolation at Hale Nani, and the diagnosis was found because of voluntary testing.

“Residents and staff on the affected unit were negative on an initial round of testing, and extensive infection control precautions were promptly implemented,” she said in an emailed statement. “However, because the virus can incubate for up to 14 days, it is possible that additional cases may continue to be identified in the coming days, even in persons who previously tested negative.”

All residents and staff at the facility will be tested as a “precaution,” she said, and those who work and live in the affected unit will be tested in “repeat rounds” in the near future.

Okubo said other infection control measures are in place, and department is in “daily contact” with Hale Nani administrators.

According to DOH officials, this is the third COVID-19 case among a nursing home resident in Hawaii. Four other employees at long term care facilities have been infected in the state to date.