Police in Warwickshire have issued a warning to owners of portable in-car satellite navigation systems following a steep rise in the numbers being stolen from vehicles.
Detective Sergeant Martyn Stephens said: "In-car sat navs are becoming the thing to have. They are highly desirable and costly items, and unfortunately they are also very portable and easy to steal."
He said in North Warwickshire alone there had been nine systems stolen in the last two weeks.
'Sat navs' are usually attached to the dashboard or windscreen by a suction pad, making them highly visible to potential thieves.
Owners are advised to always remove them when leaving their car unattended. The suction pads should also be removed because they offer a tell-tale sign to thieves that the vehicle has a system and that it may be hidden from view somewhere in the car.
Police in North Warwickshire said they were also aware that thieves were using 'blue tooth' technology to scan parked cars to identify whether electronic equipment, such as laptops, had been left.