
At least 12 people have been killed after a gunman opened fire in a bar and grill in the US.
A police officer was among the dead in the violent attack at the Borderline bar, in Thousand Oaks, California.
The gunman is also dead inside the bar, Ventura County Sheriff's spokesman said.
Sheriff Geoff Dean addressed reporters and said "this is an ongoing investigation and a tragic, tragic situation".
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