Live stream: Thousand Oaks shooting coverage

THOUSAND OAKS, Calif.  —  Twelve people, including a sheriff's sergeant, were killed by a tall, hooded gunman dressed in black who opened fire inside a crowded country dance bar in Southern California late Wednesday.

Authorities said the gunfire broke out at the Borderline Bar & Grill, a country-western dance bar in Thousand Oaks, which is about 40 miles west of Los Angeles. It was reportedly college night at the venue.

Sheriff’s Sgt. Ron Helus and a highway patrolman were responding to several 911 calls when they arrived at the bar. They heard gunfire and went inside. Helus was immediately hit with multiple gunshots, and died at a hospital early Thursday. 

The gunman also died. Ventura County Sheriff Geoff Dean said authorities did not yet know the name of the shooter or his motive. 

USA TODAY will provide live coverage of the scene and updates from police as they happen. Watch in the player above.