( CNN ) -- A Navy training jet crashed in a north Georgia forest on Monday , killing at least three people aboard and setting more than 10 acres of woodland ablaze , local and federal authorities said . A fourth person aboard the jet was unaccounted for Monday night , said Harry White , spokesman for the Naval Air Station in Pensacola , Florida . The cause of the crash was under investigation . FAA spokeswoman Kathleen Bergen said the crash of the twin-engine T-39N trainer caused no injuries on the ground . It went down just north of Morganton , Georgia , about 80 miles north of Atlanta , Fannin County Sheriff 's Maj. Keith Bosen said . `` We got reports that it was flying pretty low , '' Bosen said . The plane had flown north-northeast over the nearby town of Blue Ridge before it went down about 4:40 p.m. , he said . The mountainous area is ringed by national forest land , and the crash set the surrounding woods on fire . `` We have about a 10- to 15-acre fire still working at this time , '' Bosen said . The T-39N took off from Pensacola Naval Air Station in Florida , about 400 miles south of Morganton , Bergen said . The jet is a military version of Rockwell 's twin-engine Saberliner executive aircraft . CNN 's Nick Valencia , Devon Sayers and Larry Shaughnessy contributed to this report .
Crash of twin-engine T-39N trainer causes no injuries on the ground . Crash causes about 10 to 15 acres of forest to be set ablaze . Navy jet goes down just north of Morganton , about 80 miles north of Atlanta . Comment: