State environmental officials are investigating the second major fish kill this year near a meat rendering plant on the Skippack Creek.

Thousands of dead fish - mostly minnows - were found Wednesday in a one-mile stretch of the Skippack Creek in Franconia Township. That stretch is located downstream from the Moyer Packing Co. in Souderton, which was responsible for a similar fish kill in August.

The fish kill during the summer was caused by a malfunction at the Moyer wastewater treatment plant.

The Department of Environmental Protection says a representative of Moyer Packing Co. didn't think the latest fish kill was caused by a discharge from the plant. But DEP spokeswoman Lynda Rebarchak said the dead fish were found downstream from where the company discharges treated waste into the creek.

Contact Gene D'Alessandro at 215-854-2443 or inqonline@phillynews.com.

This article contains information from the Associated Press.