West Midlands Police has issued an alert over increase in land & Range Rover thefts.
Thieves use relay devices to get into cars - most of them cost at least £30000.
and Rover Discovery 4 models are the most sought after target.
Owners of these cars have been urged to be more vigilant and tak extra security measures.
Even when the keys are hidden in signal-jamming bag, thieves still can use the relay device.
Officers have advised to use steering locks, alarms and to install CCTV and/or trackers.