said in the parking lot. According to law enforcement, the shooter used a.45 caliber Glock handgun with an extended magazine - a modification that is already illegal in California.
The official was briefed on the investigation into Wednesday's night shooting but wasn't authorized to discuss it publicly and spoke to the AP only on condition of anonymity.
People gather to pray for the victims of a mass shooting during a candlelight vigil in Thousand Oaks, Calif., Thursday, Nov. 8, 2018.
President Donald Trump shared his condolences via Twitter.
He praised law enforcement, saying "Great bravery shown by police" and said "God bless all of the victims and families of the victims".
Julie Hanson, who lives next door to the ranch-style home that Long shared with his mother, described him as "odd" and "disrespectful" well before he left home a decade ago, got married and enlisted in the Marines. "He was a good guy", the friend told the network.
Pat Modugno from Conrad N. Hilton Foundation said, "We are deeply saddened by these senseless events that are occurring at our places of worship, where we educate our children, recreation, and where people are enjoying life".
Among the casualties was Sgt. Ron Helus, a longtime sheriff's deputy who was talking to his wife on the phone when the call came over the radio for an active shooter.
'It's the second time in about a year and a month that this has happened, ' Nick Champion told OnSceneTV. They found 12 people dead inside, including the gunman. The man is believed to have taken his own life. "If he talks, just acknowledge him, don't go into conversation with him, '" Don MacLeod said.
On Thursday, in the wake of the Thousand Oaks shooting, most country singers offered their sympathies and prayers without mentioning anything political - except for a few who have already been outspoken.
Las Vegas massacre survivors from the area would convene at the country-themed Borderline Bar.
Alaina Housley, 18, was a student at Pepperdine University. And this maniac came in and started shooting at people.
"It was a very stern, straight-faced, focused face", he said. "I know we don't have all the details in yet, but you know, it just feels like it's an attack on our community".
The gunman who killed 13 people at a bar in Southern California was a Marine who served one combat tour in Afghanistan, and was last stationed in Kaneohe Bay.
A report at the Daily Caller said authorities were attributing to Long a Facebook posting that said: "I hope people call me insane..."
"I looked up, and [the gunman] was moving to the right".
"I already didn't wish it on anybody to begin with for the first time", Kelly said outside his home in Thousand Oaks. He told the dispatcher he was outside an entrance with two California Highway Patrol officers. He said he had friends who hadn't been accounted for. Possibly in some twisted way he was raising the issue of gun control.
She told KABC-TV: "It was really, really, really shocking". Having survived last year's massacre in Las Vegas, he knew only too well what gunfire sounds like, even amid loud music.
His military service lasted almost five years, and he was honorably discharged with the rank of corporal in 2013, the Pentagon said.