Two employees of an ice cream factory fell ill when ammonia gas leaked from a cylinder kept in the factory situated on roadside of NH-53 near Panchagochia on the outskirts of the city on Saturday.
After getting information, fire brigade personnel rushed to the factory, Shyam Cold Storage, and stopped spread of the poisonous gas.
As ammonia gas is soluble in the water, the firefighters sprayed water on the cylinders, said a fire officer.
Sambalpur SDPO Utkal Das said the situation was under control. An employee of the cold store was admitted in a local hospital after he fell ill due to the effect of the gas. A case has been lodged at the Ainthapalli police station in this regard, said Das.