Concerned residents of Claremont began reporting seeing a bright light igniting a fire in a nearby field early Saturday, the Australian Broadcasting Corp. reported.
Tasmania Fire Service officer Scott Vinen said once the fire, which left a distinct burn mark, was put out an investigation into the source started.
"Once we put the fire out, we kind of walked through the fire and tried to find something," he said. "We thought a flare or something may have landed there, but we couldn't find any cause."
The Fire Service will not be investigating the incident any further, the news report said.