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A heavily armed man wearing body armor died after confronting police in Pasadena on Friday, but it was not initially clear whether the suspect was killed by police gunfire or took his own life, authorities said.

The incident unfolded shortly before 7 p.m. in a residential neighborhood on Glen Avenue, near Howard Street, according to Deputy Erin Liu of the Los Angeles County Sheriff’s Department Information Bureau.

Officers were summoned to a “man with a gun” call, Liu said.

“Upon their arrival, the officers observed the suspect standing within the fence yard of a property, wearing a ballistic bullet-proof vest and holding a firearm,” Liu said in a written statement. The deputy described the weapon as a rifle outfitted with a ” large-capacity drum-style magazine.”

“The suspect yelled at officers and then pointed the firearm at them. An officer-involved shooting occurred and the suspect retreated to the rear yard and out of the officers view,” according to Liu.

Officers soon found the suspect lying unconscious in a residential backyard, suffering from at least one gunshot wound, officials said. Paramedics pronounced the man dead at the scene.

In addition to the rifle, a handgun was also found near the suspect, Liu said. “There was evidence to support that the suspect fired at least one round.”

Officials had yet to determined whether the suspect died from police gunfire or shot himself, Pasadena spokeswoman Lisa Derderian said. No officers were hurt.

The suspect’s identity was not available early Saturday.

The investigation was being spearheaded by detectives from the Los Angeles County Sheriff’s Department Homicide Bureau.

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