A small fire broke out in a ventilation system at a Middlefield, Connecticut, business Monday morning.
Middlefield firefighters and crews from area towns responded to Zygo Corporation at 21 Laurel Brook
Road in Middlefield around 6 a.m. to put out the fire.
A sprinkler system in the business extinguished the flames.
Some of the plant employees were checked out as a precaution.
The building has reopened.
Fire officials are investigating the fire.