At least a dozen fire and emergency crews were called to a structure fire in the 3100 block of Reeder Road in Upper Fairfield Township early Saturday morning.

The initial call came in shortly after 3:30 a.m., and was upgraded to a second alarm roughly 20 minutes later.

Firefighters battled thick smoke as they work to extinguish the house fire, which had spread to an adjacent building and vehicle on the property.

There were no immediate reports of injuries with all residents reported to have evacuated, according to scanner reports.

The bulk of the fire was reportedly knocked down just after 4:30 a.m.