The New South Wales Rural Fire Service said a military training exercise sparked the largest of the wildfires that have ravaged the Australian state.
Fire investigators found that a massive fire near the city of Lithgow, west of Sydney, began on 16 October at a nearby Defence Department training area, and that the blaze was started as a result of live ordnance exercises at the army range.
The fire has scorched 47,000 hectares (180 square miles) and destroyed at least three houses, but no injuries or deaths have been reported.
The Defence Department declined to comment on the investigators' findings, but confirmed earlier that an explosive ordnance training exercise was conducted on that date
More top news
The banking group has also allocated £283m towards tackling its mistreatment of people in mortgage arrears.
Thursday will be a breezy day with sunshine and blustery showers developing for most of us.
She had been with friends at the station at 11pm the previous evening. Officers are now working to find out how she ended up on the tracks.