A sheriff's investigator was placed on leave after allegedly pulling a gun on a teenager who was watching a band play with friends at a skate park.

Cellphone footage shows the off-duty Orange County deputy approach the group in San Clemente, California, on Saturday night, and order them to stop playing music.

The band did as instructed but the confrontation quickly escalated and the officer, who has not been identified, appeared to pull out a gun and aim it at a 16-year-old boy carrying a skateboard.

One of the teens at the park, Koa McClung, told CBS Los Angeles that the deputy had aggressively grabbed one of the boys, and when a friend help up his board to intervene, the cop threatened to shoot him.

'The guy pulled a gun and said “I’l l shoot you in the f*****g face if you don’t stop"', said McClung. 'The kid dropped the skate board and it just went downhill from there.'

A sheriff's investigator was placed on leave after allegedly pulling a gun on a teenager who was playing loud music with friends at a skate park

The off-duty sheriff's investigator was reportedly unhappy that music was being played at the skate park and asked the teenagers to turn it off

The man in the white cap then apparently pointed a handgun at one teenager in the park

In the video, a badge can be seen in the deputy’s left hand although it is obscured by his fingers.

Someone can be heard telling the deputy: 'Hey back off, we're going to stop ok?'

The footage also shows the teen drop to his knees and put his hands in the air after the cop pulled the gun on him.

In other footage the deputy can be heard saying: 'When a kid raises his skateboard to hit me in the face, he's lucky he didn't get shot.'

Witnesses say he never identified himself as a deputy.

The teenager put a skate board in the air when the man had walked toward him on Saturday

The boy is then seen kneeling down with his hands in the air as the man comes toward him

Another teenager named Sage McClung, who recorded the incident, said: 'The officer wasn’t acting like an officer… just a big bully.'

An internal investigation is underway and the investigator has been put on administrative leave, according to Orange County Sheriff’s Department.

Their statement read: 'Orange County Sheriff’s Department employees are expected to conduct themselves with professionalism on and off-duty. We take this incident seriously and will fully investigate.'

Parents who were present at the park told Fox11: 'It's appalling and terrifying because sometimes we do leave our kids here unchaperoned to be with their friends.'

Another claimed: 'It's awful, we're all residents and this is a safe town.' KTLA claimed the band was called Stink Inc and those present were listening to the music when the deputy approached them.