Police forces are working across their borders to establish whether a series of early morning raids on cash machines are linked.
Thieves have used heavy construction vehicles to rip ATMs from the walls of Co-operative shops several times in Lincolnshire and Leicestershire in recent weeks.
The latest raids happened in Sapcote, Leicestershire, at 1.15am on Wednesday, and Kirton, near Boston, at 3.25am on Tuesday. On both occasions thieves used a teleporter or digger to smash through the wall of the store and rip the ATM out, before loading it onto another vehicle and driving away.
It is the same method used in a raid on the Co-operative store in Market Deeping at about 3.30am on October 1.
Police in both counties are now working together to see whether they can link any of the raids.
A Leicestershire Constabulary spokesman said: ““Whenever we have incidents of this nature we will liaise with neighbouring forces to ascertain whether there have been any similar incidents in their areas, and whether they have any information that might assist in our investigations.
“That is something we do as a matter of routine.”