Special key fobs are being distributed by police in Bath to remind people to hide their car keys when at home.
It follows a spate of burglaries where thieves have broken into houses just to steal car keys.
Pc Gerry Monks said thieves had been forced to switch their targets because of increased security on the latest high-value models.
The fob message aims to reinforce security and reads: "Take me with you - 0845 4567000 - Police Enquiries".
"We needed to identify a way of encouraging residents to secure their car keys when they go to bed at night, instead of leaving them on the hall or kitchen table," said Pc Monks.
"We hope the key rings will remind residents to take their vehicle keys to bed with them, or place them in a more secure area."
The key rings will be available for collection at Bath, Radstock and Keynsham police stations.