OLD BRIDGE, New Jersey (WABC) -- One person was killed and four others were injured in an explosion at a business in Old Bridge on Wednesday.
Emergency crews responded to the Superior Signal Company on Greystone Road just before 11:30 a.m.
When emergency crews arrived on the scene, they were told that people were trapped inside the business that makes smoke canisters.
A 73-year-old woman was killed. A 57-year-old woman suffered severe burns while a 29-year-old man also suffered burns.
A 65-year-old woman and a 62-year-old man were treated for minor burns and smoke inhalation.
The Jonas Salk Middle School located nearby sheltered in place until the situation was under control, according to the Old Bridge Township Police Department.
Police say the children weren't in danger, but due to the proximity of the school, they made the decision to have them shelter in place.
Additional police, EMS, and fire units responded from the surrounding towns of Spotswood, East Brunswick, Marlboro, and Monroe to assist.
Foul play is not suspected, but the incident remains under investigation.
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