A video posted online shows a police man in Southern California shot and killed a man who was using a metal bar to break windows at a fast food restaurant in Monterey Park Monday.

Two teenagers, who were present at the scene, captured the entire shooting on their phone camera from inside a car.

According to KTLA 5 News, police were called at around 9.30 a.m. to the Carl's Jr. in Monterey Park after receiving a complaint that an unidentified man was breaking restaurants windows.

The man entered the restaurants but left without purchasing anything before returning with a three-foot lead pipe, eyewitness said.

The video footage shows the man leaving the restaurants with a metal pipe.

He took the shocker off... the taser. He threw it at the cops, CBS news reported quoting witness Nick Escalante.

He managed to just yank it off and was still walking away, said Aragon.

In a news release, the Los Angeles County Sheriff's Department has said that as soon as he came out of the restaurants, they ordered him to drop the three-foot metal bar.

When the man refused to put his gun down, police attempted to taser him, the news release said. Police said that the man swung the bar twice at an officer, forcing the cops to open fire at the man, New York Daily reported.

One of the officers fired five shots into the man before another officer shot him a further five times. He was then rushed to the hospital where he was declared dead.

The suspect has not been identified yet and officials will disclose his identity once family is notified.

Watch the video here: