State police said they’re investigating an incident of criminal mischief at Westmoreland Memorial Cemetery in Hempfield Township.Investigators were alerted to the incident a little before 6:30 p.m. Tuesday.State police said a woman reported several items at a family member’s grave site were damaged over a period of time.Police said there are no surveillance cameras at the cemetery.They are asking anyone who sees suspicious activity in the area to report it to police.