Paramedics and firefighters were called after a chemical leak on a King's Lynn industrial estate.
The emergency call-out to the property on Scania Way, on the edge of the town, happened just before 8pm on Monday, November 27.
Crews from King's Lynn, Downham Market and Swaffham 'attended a leakage of refrigeration gas'.
They leak was isolated by engineers and the firefighters helped make the scene safe.
One person was cared for by the East of England Ambulance Service Trust.
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