A man who lives in Ersonggou village, about 5 kilometers (3 miles) from the crash site, said about 100 police have cordoned off the area.
The man, who would give only his surname Ning, told The Associated Press he heard from other locals that the craft was a helicopter that had flown from North Korea and that the pilot was killed on impact.
Ning said no buildings were hit and no one on the ground was reported injured.