The National Transportation Safety Board has opened an investigation into the fatal plane crash Sunday in Palm Beach County, Florida.

The incident went viral on social media as footage showed the moment the plane hit the ground, appearing to collide with a vehicle at an intersection. The crash occurred about 10 miles from President Donald Trump's Mar-a-Lago estate. 

"Today's plane crash in Palm Beach County, Florida is a horrific tragedy," Transportation Secretary Sean Duffy said in a social media post. "Here's what we know:
- At 12:50 PM ET, a Learjet 60 crashed in a neighborhood near Cresthaven, FL.
- All 9 people on board were killed.
- The aircraft departed from Austin, Texas, and was headed to the Bahamas.
- The FAA is sending a team to the scene to support the [NTSB]'s investigation."

Investigators are still trying to determine what caused the crash, and the NTSB has scheduled a press conference Monday on the matter. 

In an audio tape posted online, someone in the cockpit can be heard saying "Mayday, mayday," reporting the plane was descending at 10,000 feet per minute, according to Reuters. "We're going to crash into the ground,"

Ben Whedon is the Chief Political Correspondent at Just the News. Follow him on X.