What to do with stray pitbull puppies?

[KenC]

Humane society?

[Turf1600]

I found a mother pitbull and 2 tiny puppies near my neighborhood today. They were all huddled near a house. The mother isn't even full grown - probably 9 months. I threw them in my car and put them all in my backyard. Now I'm finding out that shelters won't accept them. I don't want to give them away on CL or something for fear that they'll go to a dog fighter.

Any ideas?