A federal U.S. Immigration and Customs Enforcement died of a self-inflicted gunshot wound to his head at Pier 40 in Manhattan yesterday, according to police. He was 42 years old.

Police say the incident occurred at around 11 a.m. inside Pier 40 in Hudson River Park in Chelsea. The unidentified agent apparently walked into the building and shot himself with his .40 caliber service pistol. A Walk in the Park reports that park goers were only a few feet away at the time. "It was a heartbreaking, heartbreaking," one witness told the blog.

The agent was taken to Lenox Hill Hospital, where he was pronounced dead. ICE says he worked at a field office in lower Manhattan, and they are working with the NYPD on investigating his death. "Tragically, a U.S. Immigration and Customs Enforcement (ICE) deportation officer from the New York field office suffered a self-inflicted gunshot wound and has passed away," ICE said in a statement yesterday. "The agency is not releasing further details pending notification of the officer’s next of kin."

If someone you know exhibits warning signs of suicide: do not leave the person alone; remove any firearms, alcohol, drugs or sharp objects that could be used in a suicide attempt; and call the U.S. National Suicide Prevention Lifeline at 800-273-TALK (8255) or take the person to an emergency room or seek help from a medical or mental health professional.