Firefighters were called to deal with a hazardous chemical spill at a Leicester city centre industrial unit. The alarm was raised at 7.30pm, yesterday after an incident at a chemical refining factory on the corner of Dunkirk Street and Wellington Street, off London Road. On arrival, crews called for assistance from the service's specialist Hazardous Material Environmental Protection vehicle, stationed at Loughborough. A fire service spokesman said: "The hazardous materials team was called in due to some chemicals being stored inside the unit. "Firefighters used breathing gear to enter the three-storey premises, where a small amount of caustic soda had spilled on the ground floor. Caustic soda (sodium hydroxide), although non-flammable, is a highly corrosive material, usually produced as shiny pellets or flakes which are highly water-soluble and commonly used in detergents and chemical manufacturing processes. The fire service spokesman said: "Other chemicals stored in the building were safe in their containers and fire crews liaised with on-site representatives of the company." The building was made safe and a stop message received by fire control at 8.50pm. No-one was hurt in the incident.