A Union City man shot himself in the head Wednesday morning when police responded to a 911 call at a Bergenline Avenue home, authorities said.

Police were dispatched to the 2000 block of Bergenline Avenue at around 5:15 a.m. and made contact with an "alleged female victim," who directed the officers to a second-floor apartment. There, they were "confronted" by a 57-year-old man holding a handgun, Hudson County Prosecutor Esther Suarez said.

The man then delivered a self-inflicted gunshot wound to his head and was pronounced dead at the scene, Suarez said.

During this incident, a Union City police officer deployed his Conducted Energy Device, commonly known as a taser. In accordance with the New Jersey Attorney General directive governing Conducted Energy Devices, the deployment is under investigation, Suarez added.

The HCPO did not specify what was reported in the 911 call or when the taser was deployed.

The Hudson County Prosecutor's Office is actively investigating this case with assistance from the Union City Police Department and the Regional Medical Examiner's Office. Anyone with information is asked to contact the HCPO at 201-915-1345 or to leave an anonymous tip on the agency's official website.

All information will be kept confidential.