Four patients at St. Elizabeths public psychiatric hospital have died from complications of COVID-19, the city announced on Monday. The patients were an 81-year-old woman, a 77-year-old man, a 59-year-old man, and an 87-year-old man, city officials said.

FOX 5 was the first to report the news.

According to city statistics, 28 patients at St. Elizabeths have tested positive for the disease and are currently in quarantine or isolation. Another 105 patients are in quarantine or isolation because they’re displaying symptoms consistent with COVID-19 or because of possible exposure to the virus. Two patients have been removed from quarantine or isolation, per the city.

Meanwhile, 43 staff members at St. Elizabeths have tested positive for the virus, and they are not coming to work. Another 23 staff members are quarantining due to possible exposure, making for a total of 66 staff members not currently able to report to work at the hospital. Nine staffers who were previously quarantined have returned to work, the city reports.

As of April 1, St. Elizabeths had five positive cases among staff members and just one positive case among patients, according to the Washington Post. District officials said at the time that they were increasing sanitizing measures and had begun checking the temperature of people looking to enter the hospital, per the Post.

A man named Sekou Mitchell, whose wife is a nurse at the hospital, told FOX 5 that his wife began experiencing symptoms of the disease in late March and she is now in the intensive care unit at Howard University Hospital. Mitchell alleged that nurses were not given adequate access to personal protective equipment like masks and gloves in the facility in March.

The nurses union that represents the healthcare workers at the psychiatric hospital told the outlet that staffers now have access to appropriate PPE.

The city did not immediately respond to questions from DCist regarding current and former practices to prevent the spread of COVID-19 in the hospital.

St. Elizabeths is the city’s only public psychiatric hospital, and it has a long and troubled history in the District. In 2007, federal investigators determined that conditions at the hospital were unacceptable for patients, and moved the hospital under federal oversight until 2014. There have also been reports of assaults of both patients and staff. Last year, the hospital went 28 days without running water after routine tests detected harmful bacteria in the water supply.