Pit bull puppies rescued as a result of a massive multistate raid on dogfighting operations in July. (Photo: Jeff Roberson / Associated Press)

The Los Angeles County district attorney's office and the Humane Society of the United States are collaborating to offer a 24-hour tip line -- and a substantial financial incentive for calling it -- to help L.A. County residents report incidents of dogfighting, our colleagues at the L.A. Now blog report.

The tip line will be officially announced at a press conference Tuesday at the office of L.A. County Dist. Atty. Steve Cooley.

According to L.A. Now, the tip line will be staffed by both English and Spanish speakers, and those who provide information leading to an arrest or conviction will receive a reward of up to $5,000.

Last month, Pennsylvania authorities unveiled a similar cash-for-tips program that offers up to $5,000 in reward money for information about dogfights, as well as other illegal animal-combat activities like cockfighting. The Humane Society was also involved in the creation of the Pennsylvania program.

Because of the shadowy nature of the dogfighting world, no one knows just how many dogs are made to fight or used as so-called bait dogs, but the Humane Society estimates that more than 250,000 dogs are forced to participate in the blood sport each year in the U.S. alone.