COLTS NECK, N.J. (CBSNewYork) – Two adults and two children were found dead while firefighters battled an intense mansion fire in Colts Neck, New Jersey Tuesday afternoon.

Watch: Officials On Colts Neck Fatal Fire Investigation 

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The fire department first got the call at 12:38 p.m., and crews from 20 fire departments took more than four hours to finally bring the blaze under control. Monmouth County Prosecutor Chris Gramiccioni said the intense fire damage was “creating some challenges” in the initial investigation.

“We are investigating this as an arson, an intentional fire,” said Gramiccioni.

Officials say the body of a man was found outside the home on Willow Brook Road, and the bodies of the other adult and two children were found within. All four were found severely burned, which Gramiccioni says will make things difficult for the medical examiner to determine their exact cause of death.

None of the victims were immediately identified, but property records show the home owners as Keith and Jennifer Caneiro.

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Keith and Jennifer Caneiro (credit: CBS2)

Investigators soon realized the family who owned the Colts Neck home has relatives in nearby Ocean Township, and their home also caught fire early Tuesday. Nobody was injured in that blaze, but investigators had their hands full trying to connect the dots.

“That remains to be seen but that is an option or an angle that we continue to pursue,” Gramiccioni said.

He urged anyone with any information to contact authorities.

“Any little bit can constitute a piece of the puzzle that might make things come into a clearer picture,” Gramiccioni said.

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Police say a firefighter was injured while attempting to extinguish the Colts Neck blaze, but she’s expected to make a full recovery. Gramiccioni said there was no outstanding danger to anyone in the area.