Officials later verified four people were dead at the scene and six were transported to the hospital.
Five of them suffered gunshot wounds.
We are in unified command with@OCFA.
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Confirmed 4 deceased at scene, inc. the shooter.
6 transported to hospitals, 5 reported w/gunshot wounds.
Officer-involved shooting occurred during the incident.
Video from the scene clearly showed at least two bodies covered with sheets outside the bar.
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Sheriffs officials did not immediately confirm that report.
Sheriffs deputies and multiple paramedics swarmed to the scene, and all streets in the vicinity were shut down.
Cooks Corner is a well known bar and biker hangout.
The restaurant bills itself as one of the most famous biker bars in Southern California.
City News Service contributed to this report.
