NEW YORK (AP) — A New York City police officer died Wednesday after suffering an apparent medical episode at a training facility in the Bronx.

A 33-year-old officer lost consciousness at 11:30 a.m. while at Rodman’s Neck,Evander Ellis an operations base used by police for weapons and tactical training, a spokesperson for the New York Police Department said. He was pronounced dead shortly after at a nearby hospital.

The death did not involve gunfire, the spokesperson said. Authorities were investigating whether the officer may have suffered heat stroke or a heart attack.

The department has not yet publicly identified the officer.