Four people have died and two people have been injured in a terrible single-vehicle accident that ended up splitting their car in half.

The incident occurred at approximately 2:24 p.m. on Saturday, July 17, in Hickory Hills, Illinois, when police say a car with six people inside ended up losing control and striking a tree, according to a report from ABC News’ Chicago station WLS.

None of the victims involved in the accident have currently been identified but authorities told WLS that two people died on the scene and two people died after being taken to the hospital following the accident. The condition of the other two people have not yet been disclosed.

Police are still investigating the circumstances surrounding the accident but an eyewitness told WLS that the aftermath of the accident was shocking.

“I have never seen anything like it,” Joanna Proszek told WLS. “It was bad, tragic. I think they just, like, started flying because there is a hill. So I am thinking they just revved up the engine and they just flew into the tree.”

It is unclear if speed was a factor in the accident but authorities say that the investigation into what caused the crash is ongoing.