Multiple people are believed to have been injured in a shooting at a bar packed with college students in southern California, local authorities say.
Thousand Oaks is in Ventura County, about 40 miles from downtown Los Angeles.
Officers at the scene told the newspaper that about 30 shots had been fired.
Ventura County Sheriff's Office Captain Garo Kuredjian said it is "still an active scene".
Witnesses describing the moment the gunman opened fire said the man first shot the guard at the door with a handgun.
CNN spoke to one woman who says her son dragged his wounded girlfriend outside to safety.
It was college night and country two-step lessons were being offered Wednesday at the Borderline, according to its website.
Social media reports claim the suspect shot a security guard before entering the building and throwing smoke grenades before firing more shots.
In this image made from aerial video, police vehicles line a road in the vicinity of a shooting in Thousand Oaks, California, early Thursday, Nov. 8, 2018. Another witness said the gunman wielded what looked like a sub-machine gun. Law enforcement officers hovered around the bar with flashlights and weapons were drawn.
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.
He could not immediately provide information on the extent of the victims' injuries.