FREMONT -- A pit bull puppy dog-napped by thieves during a visit to the Tri-City Animal Shelter has been found through a clever police sting and is waiting to be re-united with his adoptive family, police said Thursday.

On Tuesday, a 19-year-old man and a juvenile went dog browsing at the Tri-City Animal Shelter and while inside, they decided to steal the pit bull puppy, Fremont police said.

The puppy had already been adopted and was waiting to be united with its new family.

The two set the puppy outside the shelter building and after leaving, hopped the fence and nabbed the dog, police said.

Later, the pair listed the puppy for sale on Craigslist. With the help of a community service officer, Animal Services were able to find the puppy for sale online.

Detectives set up a sting to buy the puppy Thursday near Decoto Road and Fremont Boulevard. Once Detectives got their paws on the puppy, police were able to detain the seller and his accomplice.

Neither suspect has been identified by police, but both were cited for theft.

The puppy was returned to the shelter where it will be united with its new family.

Contact Katie Nelson at 925-945-4780 or follow her at Twitter.com/katienelson210.