It has been "quite some time" since there was a shooting of any kind in Thousand Oaks, a city of about 130,000 people about 40 miles (64 kilometers) west of Los Angeles, just across the county line.
Multiple people were reportedly injured after at least one gunman opened fire at a bar in Thousand Oaks, California, late Wednesday.
Officers from the Ventura County Sheriff's Office and California Highway Patrol said about 30 shots were fired and several people were injured.
Initial reports indicated that a man had opened fire with a semi-automatic gun at about 11.20pm.
The gunman shot a security guard standing at the front of the bar before entering the building.More news: Trump calls reporter 'rude, terrible person' at press conference following midterm elections
He said he heard from people inside that they were hiding in bathrooms and the attic of the bar.
Image: Authorities say there are multiple injuries. Active law enforcement incident. Information on the extent of the victims' injuries has not yet been released. The witness said the suspect had a handgun and then he also saw the smoke bombs and the guard being shot.
The bar is a country-themed bar known for its large dance floor and live music events, according to its website.
It is reported to be "college night" at the bar, with some suggesting the attack was aimed at university students.