Multiple people were fatally shot late... (Associated Press) 
 
 THOUSAND OAKS, Calif. (AP) — The Latest on the shooting at a Southern California bar that left 13 dead, including the gunman (all times local): 
 
 11:55 a.m. 
 
 A law enforcement official says the gunman who killed 12 people at a Southern California bar posted to social media during the attack. The official told The Associated Press that Ian David Long had Facebook and Instagram accounts and that he posted about his mental state and whether people would believe he was sane. 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.  Thousand Oaks Bar Shooting Suspect Posted on Instagram During Massacre Possible Revenge Motive 
 
 Thousand Oaks Bar Shooter Ian Long Posted on Instagram During Killings 
 
 EXCLUSIVE 
 
 12:15 PM PT -- Our sources say Long posted the same message on his Instagram and Facebook, "I hope people call me insane .. wouldn't that just be a big ball of irony? A former classmate of Long's tells TMZ, Long was bullied in high school. Garo Kuredjian speaks... (Associated Press) 
 
 Standing at the microphones, from left to right, Paul Delacourt, assistant director for the FBI Los Angeles, and U.S. Rep. Julia Brownley look on as Ventura County Sheriff's Capt. Long, who opened fire at the country music bar in Thousand Oaks on Wednesday, was seen by a mental health specialist in April who worried the 28-year-old Marine veteran might have post-traumatic stress disorder. Authorities said Long, a former Marine gunner who served one tour in Afghanistan, had been experiencing emotional issues. Investigators have not commented on a motive for the shooting, or whether mental illness played a role.
– The man who authorities say shot to death 12 people at a California bar on Wednesday was posting to social media during the attack, according to NBC. TMZ reports that sources say that Ian Long, a 28-year-old former Marine who also died in the attack, had a gun in one hand and his phone in the other during his rampage at the Borderline Bar and Grill in Thousand Oaks and posted a message to Instagram and Facebook, writing in part: “I hope people call me insane .. wouldn’t that just be a big ball of irony.” Facebook, which owns Instagram, declined NBC’s request for a comment, but did say that it had taken down Long’s accounts “and will remove any praise or support for the crime or the shooter as soon as we’re aware.” A law enforcement official tells the AP that investigators still haven’t determined a motive for the attack, adding that they are looking onto whether Long, who they believe killed himself, thought his ex-girlfriend would be at the bar. TMZ sources say that the attack was motivated by revenge, with one saying that Long had been bullied in high school and many of those former classmates often spent Wednesdays at the bar, where Long was reportedly a regular.