Security at Santander ATMs in Lancs has been compromised. Advice is not to use them. If you have lost money please contact the bank and 101.— LancsPolice (@LancsPolice) April 3, 2016
Lancashire police issued the warning on Sunday and Cheshire police said it has also received similar reports about cash machines in the Wilmslow area.
It may also affect other areas.
"We are advising the public to be vigilant, in particular of Santander machines, but of any cash machines," Lancashire police told Sky News.
"Report anything suspicious, have a visual check of the cash point and if in doubt leave it an go somewhere else. It's spread across the whole of Lancashire so it's highly likely other forces may have had reports. We do not know how many are affected."
A Santander spokesperson said: "Santander was contacted this weekend by Police who requested that five ATM machines in the North West and Lancashire area be shut down due to potential criminal activity and vandalism. The five ATMs in question were shut down immediately. The Santander ATM network remains fully operational and we are assisting the Police with their enquiries in relation to the five ATMs in the Lancashire area.
“Customers are always advised to remain vigilant and if concerned about any other ATM machines, they should contact the police immediately and not use them," the bank added.