Tragedy struck today in Aspen, Colorado.
And it was witnessed by a pair of celebrities.
According to FAA spokesman Allen Kenitzer, a twin-engine jet crashed at the local airport earlier today, with Twitter photos depicting the plane upside on the runway.
"So sad! Horrible plane crash we just saw happen at the Aspen airport," LeAnn Rimes Tweeted from Aspen, with comedian Kevin Nealon adding:
"Horrible plane crash here at Aspen airport. Exploded into flames as it was landing. I think it was a private jet. Fire truck and ambulances were on the scene within minutes."
The cause behind the crash is unknown at this time, though Aspen - due to the surrounding mountains - is known as a challenging airport into which to fly.
It's unlikely there are any survivors.
"Airport is closed now," Nealon Tweeted. "I think I'll drive back to LA after seeing that."