A large number of police are already on the scene.
The Kern County Sheriff claims the shooting stemmed from a domestic dispute.
He says the suspect shot a man, followed by his wife, and then a number of others before turning the gun on himself.
The shootings reportedly took place at five different locations.
The first shooting took place at around 5.20pm local time (1.20am BST) at a trucking business.
The suspect shot and killed a man, followed by his wife at the site.
He then chased a witness to the front of Bear Mountain Sports and shot them dead.
The suspect went on to shoot another two people at a home.
After this he hijacked a car containing a woman and child, who escaped unharmed, and headed to a highway.
Here he was confronted by a police officer, at which point he shot himself.
The primary site is a business located in Di Miller Drive.
According to US media outlets, the shooting was the result of a domestic dispute.
Police are carrying out multiple warrant searches in the area.
They are also interviewing around 30 witnesses.
It is not known whether the gunman knew all of the victims.
Bakersfield is a city in California with a population of around 347,000.