One person is dead following an explosion at a chemical plant in north Alabama. Arab Fire Chief Ricky Phillips tells WHNT-TV that a contract worker died in a blast that happened Tuesday at Umicore Specialty Chemicals in Arab. The explosion involved an empty sulfuric acid tank in a part of the plant that is still under construction. Authorities say a group of workers was making connections to the tank when the accident occurred. Officials say there isn't any danger to the public. The company's website calls it a leader in recycling and refining cobalt and nickel specialty chemicals, which it also markets. The victim's name hasn't been released. The Occupational Safety and Health Administration will investigate.