Police have been told between 7pm and 7.15pm on Friday,May 31, 2019, a vehicle was seen parked in Sedgefield cemetery, near Singleton, and unknown persons have damaged a number of gravestones.

In all, 36 gravestones were damaged during the incident; having been pushed over with a number of those being smashed.

Officers attached to Hunter Valley Police District attended and established a crime scene.

Hunter Valley detectives are continuing to investigate the circumstances surrounding the incident.

Police are appealing for anyone who witnessed the incident, or who may have noticed any suspicious activity in the area at the time, to contact police.

Hunter Valley Police District Commander, Superintendent Chad Gillies said he hopes people will come forward with the information police need to find those responsible.

"We want to find answers for the families affected by this. They have already experienced immeasurable grief, and this sort of incident stirs up those emotions all over again. Someone knows something, and we urge anyone with any information to speak up," Superintendent Gillies said.

Anyone with information is urged to contact Singleton Police Station on 02 6578 7499 or Crime Stoppers on 1800 333 000.