MONTEREY PARK (CBS) — Authorities say Monterey Park police fatally shot a man Monday who broke windows at a fast-food restaurant, then swung a 3-foot-long metal bar as he approached officers.

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The gunfire erupted about 9:30 a.m. in the 1200 block of Cesar Chavez Avenue, according to the Los Angeles County Sheriff’s Department. The sheriff’s department is investigating the shooting.

Officers were investigating a report of a man “breaking out windows” at a Carl’s Jr. restaurant, sheriff’s Sgt. Pauline Panis said.

Responding officers saw customers coming out of the restaurant, along with a man holding a 3-foot-long metal bar, Panis said.

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The officers ordered the man to drop the bar but he refused, Panis said, and at least one officer used a stun gun to try to subdue him.

The man came “in close proximity” to officers and swung the bar twice she said. At least one officer opened fire, wounding the suspect.

The suspect died of his injuries.

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Authorities withheld the name of the man, who was 20-30 years of age, pending notification of his relatives, coroner’s Chief Craig Harvey said.