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According to investigators, the owner was found on the floor of the bathroom by a co-worker, who called police.
Edison police Lt. Joseph Shannon identified the victim as 46-year-old Sushil Bhalla.
Police found a container with 4 to 5 ounces of cyanide in a back room at the store where Bhalla was working. Cyanide is used in jewelry cleaning.
Shannon said authorities are uncertain whether Bhalla died from a heart attack or exposure to the chemical.
Edison Patrolman David Stern was taken to a hospital as a precaution. Initial reports of additional injuries proved unfounded.
Neighboring businesses in the strip shopping center were evacuated as hazardous materials units investigated.
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