South Holland police backed by officers from East Midlands Operational Support Service have increased patrols to combat a spate of thefts from work vans.
Community policing inspector Gareth Boxall is appealing to the public to dial 999 at the time they spot a theft in progress.
He said: “We will get resources there as quickly as we can.”
The spate of thefts included a blitz when 20 vans were raided overnight on February 8 and 9, and among them were seven at Holbeach, three at Deeping St Nicholas and two in Crowland.
Two vans were also set alight in Holbeach after being targeted by thieves.
In the majority of cases, tools were stolen from the vans.
Insp Boxall said: “Work vans are vulnerable and we would encourage owners to consider where and how their vehicles are parked at night.
“We completely appreciate it is not always possible to empty all of the tools out of a van at the end of the day but we would encourage owners to consider how else they might be able to protect their vehicle, lights, CCTV, parking it off the road and under cover is ideal.”