Here's the original scam notice from the University Of Texas Police Department:
Bank ATMs converted to steal bank customer IDs
A team of organized criminals is installing equipment on legitimate bank ATMs in at least two regions to steal both the ATM card number and the PIN. The team sits nearby in a car receiving the information transmitted wirelessly over weekends and evenings from equipment they install on the front of the ATM (see photos). If you see an attachment like this, do not use the ATM and report it immediately to the bank using the 800 number or phone on the front of the ATM.
The equipment used to capture your ATM card number and PIN is cleverly disguised to look like normal ATM equipment. A “skimmer” is mounted to the front of the normal ATM card slot that reads the ATM card number and transmits it to the criminals sitting in a nearby car.
At the same time, a wireless camera is disguised to look like a leaflet holder and is mounted in a position to view ATM PIN entries.
The thieves copy the cards and use the PIN numbers to withdraw thousands from many accounts in a very short time directly from the bank ATM.