DALLAS -- She's just 13 years old, a middle-schooler who is now facing charges involving a serious crime.

Police arrested the girl at a local nightclub where she was allegedly bringing other young girls to dance and to serve as prostitutes.

Investigators said the 13-year-old lured other girls to Club Metropolis, enticing them with the promise of money and even forcing some of them to dance and sell their bodies for sex.

"It's a really horendous affair," said Dallas police Lt. Chess Williams.

Police estimate there are hundreds of teenage prostitutes on the streets of Dallas because there is a big demand. Recently, they found a 12-year-old girl dancing naked at a nightclub.

"I can't believe that a 13-, 14-, 15-year-old child knowlingly injects herself into a world of prostitution," Lt. Williams said.

But it did happen, and the 13-year-old in this case may talked another school friend into prostitution.

Police won't say what school the girl attended, but they're not surprised. "One of the remarkable things we learned through all of this is there's a tremendous amount of money in all this, so a huge demand for young girls in prostitution world," Lt. Williams said.

Police said the young girls aren't acting alone. They say some of the same people who are pimping out the adult prostitutes are the same ones exploiting young girls.

The 13-year-old who was arrested and others like her may be runaways whose childhoods were stolen for profit.