Thieves have been targeting catalytic converters during a spate of thefts in the east of the county.
Police have issued a warning to motorists after 10 high-clearance vehicles were targeted overnight between Tuesday, April 16, and Wednesday, April 17, in the Wellingborough and east Northamptonshire areas.
Vehicles targeted include a number of Mercedes-Benz Sprinter vans, a Mitsubishi L200 Trojan and a Ford Ranger.
Catalytic converters are part of the exhaust system and contain a number of rare metals which can make them valuable to thieves.
Vehicle crime lead for the force, Detective Inspector Ali Farr, said: “Vehicles with a high clearance tend to be targeted by criminals as they are easier to access from underneath.
“The catalytic converters can be cut or unbolted in just minutes.
“The main types of vehicles targeted include vans, pick-up trucks and 4X4s.
“We have seen a particular increase in Mercedes-Benz Sprinter vans being targeted across the county.
“Wherever possible, motorists are advised to reverse up to walls or fixed objects when parking or ensure their vehicles are housed securely.
“We urge people to remain vigilant against metal thieves targeting catalytic converters, and call us immediately if you notice anyone acting suspiciously around a vehicle.”
Witnesses to any of these incidents can call Northamptonshire Police on 101 or information can be given anonymously to Crimestoppers on 0800 555111.