A British tourist has lost several thousand dollars' worth of cash and jewellery, after a dingo stole a bag containing her valuables on a New South Wales beach.

Several witnesses told police they tried to warn the 58-year-old woman that the dingo was approaching her on Jimmys Beach, just north of Newcastle last Wednesday.

One beachgoer took photographs of the animal as it disappeared into nearby dunes carrying the bag, which contained valuable items of jewellery, cash and lollies.

Police searched the area for several hours but found no trace of the bag or its contents.

Distinctive markings helped rangers to identify the rogue dingo, which has been shot and killed.

Port Stephens Crime Manager, Acting Inspector Matthew Maroney says the animal has been the subject of several complaints in recent months.

"The offending dingo was photographed by witnesses and was clearly identified as having one leg predominantly white," he said.

"The Manning Great Lakes ranger viewed the footage.

"It was established that this animal had been the subject of numerous complaints in the prior three months, jumping onto barbeques in the van park and approaching and stealing things from people.

"The offending dingo was located and euthanised with a single rifle shot."