Fifteen cats were found shot to death among more than 30 that were abandoned in western Wisconsin, according to Humane Society officials.

The cats, 33 in all, were left near a pile of cat food in the southwest corner of the township of Spring Brook, the Dunn County Humane Society said Wednesday in a statement.

Someone then shot and killed at least 15 of the abandoned cats and kittens. The remainder were rescued. Dunn County is about an hour east of the Twin Cities.

"This is such an act of cruelty that we need to do everything we can to find the person/people responsible," the statement read.

A $3,000 reward is being offered by the society for information leading to an arrest. Tips are being handled by the Sheriff's Office at 1-715-232-1348.

The Humane Society said the influx of cats has put a strain on supplies. Information on how to help out can be found here:

Paul Walsh • 612-673-4482