President Donald Trump has called for flags at half-staff out of respect for the victims.
The fire was opened in the school Borderline Bar & Grill at about 23:20 local time (09:20 Moscow time).
Witnesses described a scene of panic in the bar when the gunman started firing. "Likewise, the shooter is dead, along with the first police officer to enter the bar...."
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Even now, the massive project remains one of the most controversial infrastructure proposals in modern American history. He signed an executive order supporting its construction in March of previous year .
Ventura County sheriff's Capt. Garo Kuredjian said hundreds of people were inside the Borderline Bar & Grill in Thousand Oaks at 11:20 p.m., and shots were still being fired when deputies arrived. The highway patrolman cleared the perimeter and pulled Helus out, and then waited as a SWAT team and scores more officers arrived.
Thirteen people have died, including a sheriff's sergeant and the gunman, after a shooting inside a crowded Southern California bar. A gunman shooting from the 32 floor of a hotel and casino with high power weapons killed 58 people.
It was college night and country two-step lessons were being offered Wednesday at the Borderline, according to its website. It's also close to several other universities including California State University Channel Islands in Camarillo, Pepperdine University in Malibu and Moorpark College in Moorpark.
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The fire in Paradise, about 180 miles (290 kilometers) northeast of San Francisco , was still burning out of control Friday. The Paradise fire is known as the Camp fire in California, and has now raged across 31 miles (20,000 acres) of the state.
Dean said Sgt Helus was a 29-year veteran of the police force who had planned on retiring soon. "It looked like he knew what he was doing".
Holden Harrah, a young man who saw the incident, cried as he told CNN that a place where he goes every week to have fun with friends had been a scene of carnage. "A friend yelled 'Everybody down!' We were hiding behind tables trying to keep ourselves covered".
Earlier in the same press conference, he told reporters that six people had been shot, including a deputy.
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Ahmad added that he saw a slowdown in economic and fuel demand growth as "more of a risk for oil over the coming months". But it is not only the United States that has meaningfully raised oil production in recent weeks.
Twelve people, including a sheriff's deputy, were killed after a gunman opened fire at a bar in Thousand Oaks, California, late Wednesday, authorities confirmed early Thursday.