Emergency crews are trying to find the location of an aircraft emergency in Victoria.
Five Country Fire Authority vehicles are at Mt Disappointment, north of Melbourne, after being called at about 10.20am on Thursday.
As of 11am, they had not yet found the aircraft and do not know what type it was, a spokeswoman said.
In a statement, Ambulance Victoria said it was called after reports of an aviation incident at Mt Disappointment around 9.35am.
Paramedics, including the air ambulance, have been dispatched.