As the U.S. economy struggles, it appears even Goodwill thrift stores aren't immune from being targeted by criminals.

Police in Belleville are looking for two robbery-minded men who were wearing masks when they entered the back of a Goodwill location Tuesday night in the Metro East city.

Investigators say the suspects were spotted by an employee who ran to the front and told other workers. All of the employees managed to flee the store.

It isn't immediately clear if anything was taken.

The suspects fled before police arrived.

There were no injuries.