A Life Care Center of Nashoba Valley nurse has died, the Littleton-based facility announced in a release Saturday.

“We are deeply saddened by the passing of one our associates during these challenging times the country is experiencing,” said Life Care Centers of America’s regional vice president Kate O’Connor. “Our heartfelt condolences go out to her family and friends.”

The nurse became ill two weeks ago and tested positive for COVID-19, the release stated. WCVB-TV reported that the nurse is Maria Krier, noting that she had told the station of her concerns over the facility’s handling of the virus days before dying Friday.

“We kept waiting for the ball to drop,” Krier told WCVB-TV. “Like, when are you going to tell us we’re exposed to it?”

The release said that the Life Care Centers of America is now asking that all staff members be tested for the virus.

To date, testing has been limited to prioritize the most vulnerable residents of Massachusetts, according to LCCA. Last week, collaborating with the Massachusetts National Guard, Life Care Center of Nashoba Valley completed full testing of all residents within the facility, according to the release.

The center noted that there are currently 75 employees who are out of work, 14 of whom have tested positive and 17 of whom are out with doctor’s orders.

In related news, The Boston Globe noted that at least 35 deaths have been linked to the LCCA nursing home in Kirkland, Washington.