A security guard on duty tried to stop them, but it was too late.
Shoppers are on high alert.
"It's getting hot, so you will see a lot more stuff like this. People are crazy. I thought that only happened in movies," Mall at Stonecrest shopper Daniel Coakley said.
"People work hard for their money, then someone goes and takes the machine. (It's) terrible," Carolyn Brown, another shopper, said.
Police told Washington that they are examining security video plus one piece of evidence that the thieves left behind.