12-year-old arrested after walking down the street with loaded AR-15 https://t.co/grnEteDMTA pic.twitter.com/SAbC3egyxR

— The Hill (@thehill) April 10, 2018

The rifle was LEGALLY OWNED by the kid’s 19-year-old brother. Only in America. https://t.co/zrOZP65UJy

— Joy Reid (@JoyAnnReid) April 10, 2018

A 12-year-old boy was arrested in Philadelphia on Saturday after he was reportedly seen walking the street with a loaded AR-15 rifle.

Philadelphia police said 19-year-old Michael Mitchell was armed with a handgun while he was arguing with his neighbor, CBS Philly reported on Monday.

During the dispute, Mitchell reportedly asked his 12-year-old brother to go grab the AR-15.

The boy was spotted walking up the street with the loaded weapon, which was legally owned by his older brother.

Both guns were inside a car when police arrived, but the teenager reportedly tried to reach for the rifle.

“I opened up the back door of the black Ford Taurus and he reached for the AR,” Officer Krzysztof Wrzesinski said. “That’s when I yelled at him to ‘stop’ and he immediately stopped and complied.”