Companies from the Hamden Fire Department conducted cold water rescue training exercises on Wednesday.
It took place near Quinnipiac University's main campus on Clark's Pond, according to a press release from the department.
The photos showed firefighters wearing water-proof suits with built-in buoyancy, with lifelines that are attached to crew members on the shore.
The training scenario involved one firefighter falling through the ice while a second firefighter tried various rescue techniques.
Hamden officials remind the public to not trust any ice over open water, despite the below freezing temperatures.
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