Two people have been killed in Indianapolis, Indiana after the vehicle they were in fell four stories from a parking garage.

Indy Star reports that the crash occurred at approximately 9:50 a.m. Wednesday morning when a black 2013 Lincoln crashed through a concrete barrier wall and landed on its roof on East Wabash Street, an alley open exclusively to pedestrians.

“(I) heard a crash, heard a boom,” local worker Robby Hancock described. “Then I kind of flinched, looked up and back and seen the concrete coming and the car coming behind it. The car just kind of came out, flipped over and came straight down and just crashed.”

Authorities quickly arrived on the scene where it was determined that there was “very little” extrication teams could do and the case was quickly turned over to the Indianapolis Metropolitan Police Department as a death investigation.

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Witness Micah Harshaw told RTV6 that there were lots of people at the time of the incident.

“What I was trying to do was get everyone back,” he said. “There was a lot of pandemonium. Everyone was trying to rubberneck, see what was going on, but I was trying to get everybody back. Get them away from what might potentially happen.”

At this early stage, it is yet to be determined what caused the crash.

“It’s just a tragic situation. We have a lot more unanswered questions than we do answered at this point,” IFB Battalion chief Rita Reith told reporters. “It could have been a number of things. Hitting the gas instead of the brake, a medical condition, any number of things could have happened.”

Images courtesy of Indianapolis Fire Department