Four people from Iowa killed in plane crash

Federal investigators have arrived to the scene of plane crash that killed four people who were from Iowa.

The crash happened around 5:45 p.m. Saturday in a wooded area southeast of Vienna, which is in southern Illinois.

Authorities said the victims are two adult men and two adult women from Iowa. Their names and ages have not been released.

Officials said the plane is registered to an individual in Iowa.

An autopsy will be conducted on the person presumed to be the pilot, according to Johnson County coroner David Rockwell.

Investigators started examining the wreckage to determine what caused the plane to crash. They said they could remain at the scene for several days.

Meanwhile, people who live in the area are still trying to process how a tragedy like this could happen.

David Oliver was cleaning his grill on his back deck on Saturday when he looked up and saw a plane flying extremely low, just barely above the power lines.

"I commented to my wife, 'He shouldn't be that low on a night like tonight,'" Oliver said. "And probably 10 to 15 seconds later heard the crash. Didn't see an explosion or fireball, but immediately called 911 and got on the four-wheeler and started the search."

The wreckage is scattered about 150 feet, according to investigators from the National Transportation Safety Board.