An inmate at Sing Sing Correctional Facility with the coronavirus has died, marking the first confirmed death of a prisoner with the disease in New York.

The state Department of Corrections and Community Supervision confirmed that 58-year-old Juan Mosquero, who had been locked up in Sing Sing in Westchester County, died on March 30.

The Westchester County Medical Examiner’s office confirmed on Thursday that Mosquero had tested positive for coronavirus but that his exact cause of death will not be determined for about three more weeks.

Mosquero was doing time for sex crimes that include first-degree course of sexual conduct with a child, according to court papers.

As of Thursday, 24 of New York State’s 43,000 incarcerated prisoners have tested positive for coronavirus, as have 11 parolees.

Meanwhile, 176 of the department’s 29,000 staff members are confirmed to have been infected with the deadly bug.

David Luther, vice president of the southern region for the New York State Correctional Officers and Police Benevolent Association, told Gothamist/WNYC that six inmates out of about 700 at Sing Sing have tested positive for coronavirus, as have 29 corrections officers.

No COVID-19-related deaths have been reported from local or federal jails in New York City.

In response to reports of Mosquero’s death, the Parole Preparation Project and the Release Aging People in Prison Campaign released a joint statement calling on Gov. Andrew Cuomo to grant clemency to “thousands” of inmates as confirmed coronavirus cases mount.

“We’ve been warning Governor Cuomo that this was coming. For weeks, we, top public health experts, and thousands of everyday New Yorkers pleaded for him to use his clemency power to release older adults and others in prison with compromised immune systems,” the statement reads.

“We knew people were going to die,” the statement continues.

Last week, Cuomo committed to releasing 1,100 inmates who are being held on noncriminal parole violations.