Several patrons inside the Southern California bar that was the site of a mass shooting Wednesday night were reportedly also survivors of the 2017 Las Vegas massacre.

Nicholas Champion, who was inside the Borderline Bar and Grill in Thousand Oaks, Calif., at the time of the shooting, told CBS News that he and many others there were also at the country music festival where nearly 60 people were killed in October 2017.

"It's the second time in about a year and a month that this has happened," Champion told CBS News. "It's a big thing for us. We're all a big family and unfortunately this family got hit twice."

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Police have identified the suspected gunman in Wednesday night's mass shooting as 28-year-old Ian David Long, a U.S. Marine Corps veteran. He is believed to have killed 12 people and injured others before turning his gun on himself.

While many of the victims have not yet been identified, officials say as Ventura County Sheriff’s Department Sgt. Ron Helus, a 29-year law enforcement veteran, was killed in an exchange of gunfire with the shooter.

The bar, which was hosting its weekly college country night on Wednesday, is apparently a popular gathering spot for some of the Las Vegas survivors, according to the Los Angeles Times.

The Las Vegas attack is the deadliest mass shooting in U.S. history.