WICHITA, Kan. -

Local law enforcement officers said their hands are tied over a suspicious cell phone activity.

It starts when several pricey phones are purchased at one time. Authorities said a scammer usually pays college kids or homeless people to purchase the phones from the business. The phones are later re-sold online or overseas for hundreds of dollars more.

The person buying the phone has to sign up for a service contract, and in similar cases, scammers have rung up thousands of dollars in charges that which the phone purchaser is responsible. If they don't pay, the bills damage their credit.

Police told Eyewitness News there's not much they can do since no crime is committed at the point of the sale. But they are aware of the scam, and are investigating similar cases in the area.

Authorities said do not purchase cell phones from anyone you don't know.