Residents in Lancaster, Pennsylvania, were under a shelter-in-place order for half a mile early Sunday after a hazardous materials leak was reported near a meat company, officials said.
The incident involved anhydrous ammonia at the Kunzler Meat Company 652 Manor Street, the HazMat 2 Environmental Fire Rescue Company said.
Anhydrous ammonia is stored as a liquid under pressure, but becomes a toxic gas when released, according to health officials.
Neighbors reported smelling an odor near the company building around 7:30 a.m., FOX43 in York reported.
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No injuries were reported.
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Officials warned residents to stay indoors while HazMat teams set up devices to take air samples throughout the area.
No further details were immediately available.
