Fire & Rescue NSW Gunnedah was quick to respond to a grass fire in Gunnedah on Tuesday morning.
Deputy captain Andrew Johns said the call came through to the station at 5.24am about a grass fire on the side of Apex Road on Mount Porcupine.
Mr Johns said the crew took both a truck and a tanker and arrived on the scene in seven minutes.
“It was an area of about 20m by 15m near the hairpin at [Mount Porcupine]. It involved a large log, which can be hard to put out,” he said.
"They ended up using bushfire foam.
“I don’t know how it started but I’d say it was suspicious.
“If it was deliberately lit, it’s pretty reckless behaviour given the conditions.”
Fire and Rescue NSW is liaising with the owners of covert anti-dumping cameras that are in the area to investigate the cause further.
Mr Johns said firefighters were called to a grass fire nearby just four days ago, which was also being treated as suspicious.
According to the Rural Fire Service, a very high fire danger rating is in place for the Gunnedah area on Tuesday, which is expected to remain in the hot conditions.