THOUSAND OAKS, Calif. — A tall, hooded gunman dressed in black and covering his face with a bandana opened fire late Wednesday during “college night” at a crowded country dance bar in Southern California, killing 11 people and a sheriff’s sergeant.

Ventura County Sheriff Geoff Dean identified the gunman as David Ian Long, 28, a Marine veteran, who was described as “acting a little irrationally” when police were called to his home earlier this year to investigate a disturbance.

He was armed with a handgun that had an extended magazine. He died of an apparently self-inflicted gunshot wound.

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. Hundreds of people fled in terror, including some who used bar stools to break windows and escape.

Source: Thousand Oaks shooting: 12 dead in California bar, including sergeant