A group of Las Vegas mass killing survivors were at Wednesday night's massacre at a California bar

Several people attending Wednesday's country night at the Borderline Bar and Grill in Thousand Oaks, California, reportedly survived the 2017 Las Vegas massacre.

A mass killing at the California bar took the lives of 12 people, including a sheriff's sergeant, late Wednesday night.

The Las Vegas massacre — which took place at the Route 91 country music festival on Oct. 1, 2017 — took the lives of nearly 60 people and injured many more. It is widely considered to be the deadliest mass killing the U.S. has ever seen.

What are the details?

According to CBS News, Nicholas Champion — who was inside the bar when the suspect opened fire on the crowd — said that he and others who'd survived the Las Vegas massacre were gathered at the bar Wednesday.

"It's the second time in about a year and a month that this has happened," Champion said. "I was at the Las Vegas Route 91 mass shooting, as well as probably 50 or 60 others who were in the building at the same time tonight. It's a big thing for us. We're all a big family, and unfortunately, this family got hit twice."

The Los Angeles Times reported that the Borderline Bar and Grill has been a very popular place for some of the survivors of the Las Vegas massacre to gather.

Chandler Gunn, 23, of Newbury Park, California, said that his mother awakened him to tell him the news of the mass killing on Wednesday night.

Gunn rushed to the bar, according to the outlet, to see if a friend who works there was OK. Gunn discovered that she was, but that didn't make the night's events any easier for him.

“A lot of people in the Route 91 situation go here,” he said. “There’s people that live a whole lifetime without seeing this, and then there’s people that have seen it twice.”

Savannah Stafset, another young woman who was inside when the suspect began firing, said that the bar was "insanely crowded" for college night, and that the suspect's gunfire was rampant.

“There are no words. Those are my people. It’s just not fair. It’s not fair,” she said. “All these people after Route 91. It’s not fair.”