Police say it happened on Sunday, March 12, while officers were conducting a traffic stop.
The Oxnard Police Department says the man ran up to officers, yelling and holding a steel pipe.
Two officers drew tasers while the third pulled a handgun.
The one officer shot the man multiple times after he refused to back-up.
The man later died at the hospital.
All three officers are currently on paid administrative leave, as is standard procedure.