Police are appealing for witnesses after a string of thefts from memorials at Kettering Crematorium.
Items of high sentimental value were stolen on three separate occasions between Thursday August 22 and Sunday September 22.
The thieves took an ornamental train, scooters and pots.
Sergeant Alex Kitney, of Northamptonshire Police, said: "These despicable crimes have caused significant distress to the families who left these items as tributes to their loved ones. The items have little monetary value but are of huge sentimental value to the families."