Two people were killed in Indiana on Wednesday after the car they were in plunged from the fourth floor of a parking garage, officials said.

An unidentified man and woman were inside the 2013 Lincoln in a garage near the Indianapolis City Market, when around 10 a.m., the car crashed through a barrier, dropping to the ground below.

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The car landed upside down on its roof in an alleyway. It had an Illinois license plate, according to the Indianapolis Star.

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"There was very little that the extrication teams could do. It's been turned over to [police] as a death investigation," Rita Reith, of this Indianapolis Fire Department, told reporters. "It's just a tragic situation. We have a lot more unanswered questions than we do answered at this point."

It's unclear what caused the car to plow through the fourth-floor barrier in the garage, and Reith said it appears to be a "tragic accident."

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"It could have been a number of things," Reith said. "Hitting the gas instead of the brake, a medical condition, any number of things could have happened."

The fire battalion chief said code enforcement was called to check for structural damage to the parking garage.