Authorities say they've contained a hydrochloric acid leak at a south Omaha rail yard.

The acid leaking from a Burlington Northern Santa Fe rail car was reported about 6 this evening. It prompted the evacuation of several homes and businesses in the area, including Rosenblatt Stadium and Henry Doorly Zoo.

Joe Gibilisco, battalion chief of the Omaha Fire Department, said the leak was sealed about two hours after it was reported, but crews would remain on the scene until a team from Arkansas that specializes in acid spills arrives.

Gibilisco said the leaky rail car held about 100 gallons of the corrosive chemical, and he wasn't sure how much had leaked. He said the spill area covered a stretch that was 75 feet long and 10 feet wide.