A witness to the deadly shooting inside a Halloween store at a Bay Area mall described the terrifying scene as shots rang out and she ducked for cover — fearing she was “going to die” as several victims were struck by gunfire.

Jocelyn Lopez Tabares, 15, and her 23-year-old sister were picking up last-minute accessories for their costumes Friday night at the Spirit Halloween store at the Solano Town Center in Fairfield when a barrage of shots erupted.

“I felt like I was going to die,” Lopez Tabares, of Vallejo, told the California Post. “I thought it was going to be my last time living. I didn’t want to die that way.”

The shooting, which left one person dead and six others injured, was a “targeted incident” carried out by a lone gunman, police announced. The suspect remained on the run as of Saturday afternoon.

Lopez Tabares, who was standing near the checkout registers, initially mistook the gunfire for popping balloons, until her sister dragged her to the concrete floor, she recalled.

“We were in line getting ready to leave,” Lopez Tabares said. “Out of nowhere, we just hear at least 10 shots go off. I thought it was a balloon popping. I was in shock, and everyone just went down. My sister pulled me down because I couldn’t move. I was so scared.”

As dozens of shoppers scrambled toward the exits in panic, the 15-year-old found herself frozen on the floor.

“All I could hear was people screaming and running from the back to the front,” she said.

The teen then pulled out her cellphone and began recording, determined to document the scene in case she did not survive.

“I just had a feeling to do it… to record for evidence,” she said. “And then after I stopped the video, I called my mom, because what if I wasn’t going to make it out of there?”

The footage shows the panic inside the store as people drop between merchandise racks and frantically take cover. Lopez Tabares said she later shared the clip online after seeing early social media rumors questioning whether a shooting had even happened.

Within minutes of the rapid gunfire, the bustling shop was nearly deserted, leaving only the sisters and a handful of terrified patrons hiding on the floor.

That was when she heard the desperate cries of a frantic mother echoing through the aisles.

“All I could hear was this mom yelling, ‘My baby, he’s dead!’ She was just crying for him,” Lopez Tabares recalled. “She was like, ‘My son… you guys can’t leave him here.’ She looked at my sister, but we couldn’t do anything.”

Authorities have not identified the person who was killed.

Other shoppers inside the retailer described a similarly surreal scene.

Witness Miena Davis told KCRA that shoppers initially froze after hearing popping sounds before a second round of gunfire sent people stampeding toward the mall entrance.

“It was immediate panic,” Davis said. “You heard a mom crying out for their child. And it just was so surreal.”

When Lopez Tabares and her sister finally stood up to run for their lives, they encountered a horrific scene near the exit.

“While we were walking out, there were bodies right there,” she told The Post. “There were two bodies… they were not moving at all.”

Shaken and terrified, the sisters reached their car and drove to their Vallejo home.

The shooting occurred around 8:30 p.m. inside the pop-up retailer at the former Best Buy space.

Fairfield police announced Saturday morning that detectives are investigating the attack as a “targeted incident” carried out by a lone gunman who fled the property before officers arrived.

The FBI’s Sacramento Evidence Response Team has joined local detectives to investigate.