Police released this image of two men sought in an ATM skimming investigation. (Montgomery County Police)

Montgomery County detectives are looking for two men suspected of placing “skimming” devices on ATMs at two banks in the Bethesda and Chevy Chase areas.

The devices, which have popped up around the world, record victims’ account numbers, which the skimmer owners then use to fraudulently take money from accounts. Detectives in Montgomery think that there are multiple victims, and that the suspects have taken thousands of dollars from bank accounts, according to a police spokeswoman.

Detectives ask that anyone with information about the suspects call 240-773-6330. Those who wish to remain anonymous or be eligible for a possible reward can call 1-866-411-TIPS (8477).

Here are tips of how to spot one type of skimming device. And here are tips from Montgomery County police about how best to use ATM’s and credit card readers.