Learjet from Austin bursts into flames near a busy Palm Beach County road; federal investigators to examine the cause. All nine people aboard a Bahamas-bound business jet died in a crash in South Florida, US Transportation Secretary Sean Duffy said.The Learjet 60 came down near a busy road in Palm Beach County after departing Austin, Texas.Federal investigators are examining the cause; injuries on the ground and damage to nearby homes remain unconfirmed.