Two dead and at least 19 others injured after toxic gas incident at US chemical plant

Workers had been carrying out cleaning and decontamination procedures in preparation for shutting down the plant when the accident occurred.

Authorities confirmed that 21 individuals in total were transported to hospital, with two subsequently pronounced dead.

Officials stated they would not be disclosing the identities of those who died or those receiving medical care following the toxic exposure.

A deadly gas was produced when nitric acid came into contact with a substance known as M2000A, triggering the release of hydrogen sulphide, an extremely poisonous compound.

C.W. Sigman, the Commission Emergency Management Director, described how the mixture "caused a violent reaction of chemicals, and it instantaneously overreacted".

He observed that "the two most dangerous times of a chemical plant's life is start-up and shut down".

Among those hospitalised were seven ambulance crew members who had responded to the emergency, themselves becoming casualties of the toxic fumes whilst attempting to assist others at the scene.

Emergency services arriving shortly before 10am prompted authorities to impose a shelter-in-place directive, covering a one-mile radius surrounding the facility.

Local residents and businesses received notification of the hazardous leak through an emergency alert system.

Route 25, which passes directly in front of the plant, was closed to traffic, whilst the adjacent Route 60 experienced a brief shutdown.

Schools in the vicinity kept pupils indoors as a precautionary measure, though all shelter orders were rescinded roughly five hours after the initial incident.

The contamination necessitated an extensive decontamination process, with affected individuals required to remove their clothing entirely before being hosed down by emergency personnel.

Catalyst Refiners operates as a compact, warehouse-scale business specialising in extracting silver from industrial chemical residues.

The facility's parent company, Ames Goldsmith Corp, released a statement acknowledging the tragedy: "This is an unfathomably difficult time. Our thoughts and prayers are with our colleagues and their families."

The corporation pledged full cooperation with local, state and federal authorities conducting their investigation into the incident.

Mr Sigman noted that the silver recovery operation can retrieve thousands of dollars worth of precious metal simply by vacuuming office floors at processing plants.

Several workers present during the leak refused medical examination afterwards, with officials unable to compel them to seek treatment.