Los Angeles County prosecutors are teaming up with the Humane Society of the United States to announce what they say is a first-of-its-kind dog-fighting tip line and reward program. [Updated 2:17 p.m.: An earlier version of this post gave an incorrect name for the Humane Society.]

The 24-hour tip line, staffed by people who speak English and Spanish, will allow county residents to anonymously report dog-fighting incidents and collect up to $5,000 in reward money for information leading to an arrest or conviction.

The new tip-line number will be announced Tuesday at the office of L.A. County Dist. Atty. Steve Cooley at the downtown Criminal Courts building.