Police are appealing for information after a gravesite was set on fire in Wentworth Falls on Saturday night.
Emergency services were called to a cemetery on the Great Western Highway about 8pm on November 30 following reports of a fire.
Police have been told two people, in company of a dog, were seen putting sticks and leaves on top of the grave and set it alight. They fled the scene on foot before emergency services arrived.
NSW Fire and Rescue attended to ensure the fire was extinguished.
Blue Mountains mayor Mark Greenhill condemned the act of vandalism.
"Anyone lighting fires in the open during this time of heightened bushfire risk is acting irresponsibly. In addition, vandalising a grave is deeply unacceptable," he said.
"I call on anyone with any information to immediately alert the police. This is a distressing incident and it is one that cannot pass without comment. Like the rest of the community, I was quite upset to hear about it. Our officers will check the grave for damage and make the necessary repairs if needed."
Anyone with information or who may have CCTV or dashcam vision from the surrounding area are urged to contact Blue Mountains police on (02) 4751 0299 or Crime Stoppers on 1800 333 000.
The grave did not sustain permanent damage.