A man threatened to kill three people Monday afternoon in a fit of road rage in Pasadena.

The incident began on Los Robles Avenue near Maple Street at about 5:19 p.m. Accompanied by a 25-year-old man, a 21-year-old man was learning to drive a manual transmission vehicle when he stalled the engine, Pasadena police Lt. John Mercado said.

The driver behind them got out of his newer, black four-door BMW to yell at the two, and they exited their vehicle and engaged in a fist fight with the aggressor, Mercado said. The BMW’s driver was described as a 20-30 year old white male who is 6-feet tall, weighs 180 pounds. and was wearing a black and gray striped, long sleeve shirt, gray pants and black boots.

A 45-year-old male driver saw the fight and stopped and exited his vehicle to try to break it up, at which point the aggressor went back to his BMW, retrieved a handgun, pointed it at the three men and said he was going to shoot them, Mercado said.

All three of the victims are Pasadena residents, Mercado added.

The first two men got back into their vehicle and attempted to drive away before being stopped by pedestrians crossing a block away. The aggressor got back into his car to chase them, and when they were forced to stop, he got out and attempted to open both of their doors only to find both were locked, Mercado said.

The two men left, and the aggressor resumed chasing them, Mercado said. Meanwhile, the third man hung behind the aggressor to follow him.

Once the aggressor realized he was being followed, he pulled off and began driving erratically to shake the third man who was tailing him, Mercado said. After the aggressor began running red lights, the third man quit chasing.

The aggressor was gone by the time Pasadena police arrived, Mercado said. The 25-year-old man was the only one injured, suffering bruising and swelling to his forehead and left cheek.