CEDAR RAPIDS (AP) - An arrest has been made in the slaying of 50 ducks at a children's zoo in Cedar Rapids.

Nineteen-year-old Zachary Kanellis, of Cedar Rapids, was arrested Wednesday and charged with second-degree criminal mischief and livestock abuse.

The charges are related to the June 25, 2008 discovery of 50 ducks found dead at the Bever Park Children's Zoo. Workers arrived at work to find locks on the building and the cages inside had been broken.

Police say the ducks had been stoned to death. Forty-five other ducks were unharmed.

A tip to the Cedar Rapids Crimestoppers program led to the arrest.

The investigation is continuing.