CEDAR RAPIDS, Iowa (AP) -

Cedar Rapids firefighters are working to contain and clean up a hydrochloric acid spill at a Cargill plant.

City officials say acid leak was reported around 7:30 a.m. Sunday after a truck driver noticed that acid was leaking out of his semitrailer tank.

The truck's tank had about 46,000 pounds of hydrochloric acid in it, but it appears to have a hole in the side.

The leaking acid has created an acidic mist in the area, but officials say the acidic cloud appears to be staying at the Cargill plant because the cloud is heavier than air.

Firefighters and hazardous materials experts are working with Cargill employees to determine the best way to unload the truck safely.

Hydrochloric acid is extremely corrosive but it has many industrial uses.