Police in Colorado have confirmed that emergency crews responded to a small plane crash at Aspen Airport. Witnesses say the private aircraft burst into flames when it crash landed on Sunday afternoon.

Update, 4:18p ET: At least one person was killed in the crash, authorities say. Below are more details from FoxNews.com:

The Pitkin County Sheriff's Office confirmed that three people were on the plane. Of the survivors, one suffered serious injuries, and one was said to have suffered minor injuries.

The Federal Aviation Administration said the plane appears to be a Bombardier Challenger 600 that took off from Tuscon.

Comedian Kevin Nealon, an apparent eyewitness, tweeted details about the crash.

"Horrible plane crash here at Aspen airport," he said. "Exploded into flames as it was landing. I think it was a private jet."

Aspen, nestled in the Rocky Mountains, is about 100 miles southwest of Denver.