At least 12 people were killed and as many as 10 others were injured when a gunman burst into a packed Southern California bar, tossing smoke grenades and firing dozens of rounds, witnesses and authorities said. The suspect was found dead inside the bar, police said. Police said they responded to the Borderline Bar and Grill in Thousand Oaks, about 40 miles west of Los Angeles, just before midnight local time. Hundreds were inside the bar at the time. Sgt. Ron Helus was among the dozen killed overnight, according to the Ventura County Sheriff’s Department. Helus was a 29-year veteran and was one of the first on the scene, when he was fired on multiple times. Authorities are working to determine who the suspect was, and what his motive may have been.

The Borderline Bar and Grill is a country-themed bar known for its large dance floor and live music events, according to its website.

12 victims killed, suspect dead after mass shooting at California bar’s college night

Via www.nbcnews.com